What is CRYPTOSYSTEM? What does CRYPTOSYSTEM mean? CRYPTOSYSTEM meaning -CRYPTOSYSTEM pronunciation - CRYPTOSYSTEM definition - CRYPTOSYSTEM explanation - How to pronounce CRYPTOSYSTEM? Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ In cryptography, a cryptosystem is a suite of cryptographic algorithms needed to implement a particular security service, most commonly for achieving confidentiality (encryption). Typically, a cryptosystem consists of three algorithms: one for key generation, one for encryption, and one for decryption. The term cipher (sometimes cypher) is often used to refer to a pair of algorithms, one for encryption and one for decryption. Therefore, the term cryptosystem is most often used when the key generation algorithm is important. For this reason, the term cryptosystem is commonly used to refer to public key techniques; however both "cipher" and "cryptosystem" are used for symmetric key techniques.
Views: 1838 The Audiopedia
Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 496678 itfreetraining
Audible free book: http://www.audible.com/computerphile Hashing Algorithms are used to ensure file authenticity, but how secure are they and why do they keep changing? Tom Scott hashes it out. More from Tom Scott: http://www.youtube.com/user/enyay and https://twitter.com/tomscott http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Pigeon Sound Effects courtesy of http://www.freesfx.co.uk/ Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels
Views: 787144 Computerphile
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/donateinfi Learn through active problem-solving at Brilliant: https://brilliant.org/InfiniteSeries/ Last episode we discussed Symmetric cryptography https://www.youtube.com/watch?v=NOs34_-eREk Here we break down Asymmetric crypto and more. Tweet at us! @pbsinfinite Facebook: facebook.com/pbsinfinite series Email us! pbsinfiniteseries [at] gmail [dot] com Previous Episode (Almost) Unbreakable Crypto | Infinite Series https://www.youtube.com/watch?v=NOs34_-eREk How To Break Cryptography https://www.youtube.com/watch?v=12Q3Mrh03Gk&list=PLa6IE8XPP_gnot4uwqn7BeRJoZcaEsG1D&index=2 Last time, we discussed symmetric encryption protocols, which rely on a user-supplied number called "the key" to drive an algorithm that scrambles messages. Since anything encrypted with a given key can only be decrypted with the same key, Alice and Bob can exchange secure messages once they agree on a key. But what if Alice and Bob are strangers who can only communicate over a channel monitored by eavesdroppers like Eve? How do they agree on a secret key in the first place? Written and Hosted by Gabe Perez-Giz Produced by Rusty Ward Graphics by Ray Lux Assistant Editing and Sound Design by Mike Petrow and Meah Denee Barrington Made by Kornhaber Brown (www.kornhaberbrown.com) Thanks to Matthew O'Connor and Yana Chernobilsky who are supporting us on Patreon at the Identity level! And thanks to Nicholas Rose and Mauricio Pacheco who are supporting us at the Lemma level!
Views: 59409 PBS Infinite Series
This animation by the Centre for Quantum Technologies at the National University of Singapore illustrates the process of quantum key distribution using entangled photons. The goal is for two people in different places to end up with identical keys by measuring these photons. We want these people - usually given the names Alice and Bob - to have a random sequence of 1s and 0s that they can use to scramble (and then unscramble) a message. The presence of entanglement between the photons means that any snooping will be revealed. Note: this animation has no sound. See also our video series on cryptography: https://www.youtube.com/playlist?list=PL4CHL5j4XhurVKJz16Qg6qj0toMHyLh7q
Views: 28621 Centre for Quantum Technologies
Dr. Virgil Gligor, Professor of Electrical and Computer Engineering, Carnegie Mellon and Cylab, presents "On the Fragiliity of Adversary Definitions in Cryptographic Protocols" on November 6, 2008. Note: Original video was 320x240.
Views: 330 Rutgers University
cryptography explain in Hindi ....... cryptography lecture, cryptography, cryptography in hindi, cryptography beginners, cryptography basics tutorial, cryptography definition, cryptography explained, cryptography hindi, cryptography history, cryptography introduction . . . . . Like, Share, Support, Subscribe!!! Youtube: https://www.youtube.com/channel/UCXBHB2v2EizKrqOu5YmR8uQ Website: http://www.technoawareness.in/ Facebook: https://www.facebook.com/technoawareness1/ Instagram: https://www.instagram.com/technoawareness8/ Twitter: https://twitter.com/AwarenessTechno linkedin: https://www.linkedin.com/in/techno-awareness-580527168/ Quora: https://www.quora.com/profile/Techno-Awareness/ Reddit: https://www.reddit.com/user/technoawareness FB group: https://bit.ly/2w6uHJX
Views: 111 TECHNO AWARENESS
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/donateinfi Only 4 steps stand between you and the secrets hidden behind RSA cryptography. Find out how to crack the world’s most commonly used form of encryption. Tweet at us! @pbsinfinite Facebook: facebook.com/pbsinfinite series Email us! pbsinfiniteseries [at] gmail [dot] com Previous Episode: Can We Combine pi & e into a Rational Number? https://www.youtube.com/watch?v=bG7cCXqcJag&t=25s Links to other resources: Shor's paper: https://arxiv.org/abs/quant-ph/9508027v2 Lecture on Shor's Algorithm: https://arxiv.org/pdf/quant-ph/0010034.pdf Blog on Shor's algorithm: http://www.scottaaronson.com/blog/?p=208 Video on RSA cryptography: https://www.youtube.com/watch?v=wXB-V_Keiu8 Another video on RSA cryptography: https://www.youtube.com/watch?v=4zahvcJ9glg Euler's Big Idea: https://en.wikipedia.org/wiki/Euler%27s_theorem (I can find a non-wiki article, but I don't actually use this in the video. It's just where to learn more about the relevant math Euler did.) Written and Hosted by Kelsey Houston-Edwards Produced by Rusty Ward Graphics by Ray Lux Made by Kornhaber Brown (www.kornhaberbrown.com) Challenge Winner - Reddles37 https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z135cnmgxlbwch1ds233sbzgaojkivaz004 Comments answered by Kelsey: Joel David Hamkins https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z13zdpcwyk2ofhugh04cdh4agsr2whmbsmk0k PCreeper394 https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z135w324kw21j1qi104cdzvrpoixslmq1jw
Views: 195057 PBS Infinite Series
Enroll to Full Course: https://goo.gl/liK0Oq The "OSI Model" also known as "OSI Reference Model" is discussed here in 2 parts: a) Understanding OSI Reference Model b) OSI Model layers a) Understanding OSI Model (00:22): http://youtu.be/p7UR7Nipqcs?t=22s The OSI reference model is one such communication model. OSI stands for "Open Systems Interconnection" which means that every system participating in this model is open for communication with other systems. This model was first defined by an organization called as ISO. The OSI model divides the communication into 7 layers. b) OSI Model layers (2:15) : http://youtu.be/p7UR7Nipqcs?t=2m15s Quick Look of the 7 layers of the OSI reference Model: 7) Application Layer is where the users interact with applications to provide data 6) Presentation Layer is concerned with the format of data exchanged between the end systems 5) Session Layer allows users on different machines to create sessions between them 4) Transport Layer is concerned with end to end communication of messages 3) Network Layer is concerned with routing of packets to correct destination 2) Data Link Layer is concerned with transmission of error free data in the form of Frames 1) Physical Layer is concerned about transmission of raw bits over the communication link Search Terms: OSI Model, OSI layers, OSI Model Layers, OSI 7 Layers, Network Layer, 7 Layers of OSI model, OSI network Model, what is osi model, OSI system, OSI Reference Model, ISO OSI Model, OSI Model layers, video URL : https://www.youtube.com/watch?v=p7UR7Nipqcs Watch ALL CN VIDEOS: https://www.youtube.com/playlist?list=PL9OIoIp8YySF4mkIihOb_j2HZIRIlYuEx For more, visit http://www.udemy.com/u/EngineeringMentor Facebook: https://www.facebook.com/SkillGurukul Twitter : https://twitter.com/Engi_Mentor
Views: 669689 Skill Gurukul
Supplement to the cryptocurrency video: How hard is it to find a 256-bit hash just by guessing and checking? What kind of computer would that take? Cryptocurrency video: https://youtu.be/bBC-nXj3Ng4 Home page: https://www.3blue1brown.com/ Several people have commented about how 2^256 would be the maximum number of attempts, not the average. This depends on the thing being attempted. If it's guessing a private key, you are correct, but for something like guessing which input to a hash function gives the desired output (as in bitcoin mining, for example), which is the kind of thing I had in mind here, 2^256 would indeed be the average number of attempts needed, at least for a true cryptographic hash function. Think of rolling a die until you get a 6, how many rolls do you need to make, on average? Music by Vince Rubinetti: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that). If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended Various social media stuffs: Website: https://www.3blue1brown.com Twitter: https://twitter.com/3Blue1Brown Patreon: https://patreon.com/3blue1brown Facebook: https://www.facebook.com/3blue1brown Reddit: https://www.reddit.com/r/3Blue1Brown
Views: 1058061 3Blue1Brown
https://8gwifi.org/CipherFunctions.jsp Encryption Decryption Online https://8gwifi.org/CipherFunctions.jsp what is DES DATA ENCRYPTION STANDARD (DES) The Data Encryption Standard (DES) specifies two FIPS approved cryptographic algorithms as required by FIPS 140-1. When used in conjunction with American National Standards Institute (ANSI) X9.52 standard, this publication provides a complete description of the mathematical algorithms for encrypting (enciphering) and decrypting (deciphering) binary coded information. Encrypting data converts it to an unintelligible form called cipher. Decrypting cipher converts the data back to its original form called plaintext. The algorithms described in this standard specifies both enciphering and deciphering operations which are based on a binary number called a key computer security cryptography data encryption standard animation
Views: 74014 Zariga Tongy
Hackerdashery #2 Inspired by the Complexity Zoo wiki: https://complexityzoo.uwaterloo.ca/Complexity_Zoo For more advanced reading, I highly recommend Scott Aaronson's blog, Shtetl-Optimized: http://www.scottaaronson.com/blog/ ----- Retro-fabulous, cabinet-sized computers: System/360: http://en.wikipedia.org/wiki/IBM_System/360 photo: "360-91-panel". Licensed under Public domain via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:360-91-panel.jpg#mediaviewer/File:360-91-panel.jpg PDP-8: http://en.wikipedia.org/wiki/PDP-8 photo: "PDP-8". Licensed under Public domain via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:PDP-8.jpg#mediaviewer/File:PDP-8.jpg ----- Protein folding illustration: "Protein folding schematic" by Tomixdf (talk) - Own work (Original text: “self-made”). Licensed under Public domain via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Protein_folding_schematic.png#mediaviewer/File:Protein_folding_schematic.png P vs. NP opinion poll: http://www.cs.umd.edu/~gasarch/papers/poll2012.pdf
Views: 1875276 hackerdashery
We are going to recover a ECDSA private key from bad signatures. Same issue the Playstation 3 had that allowed it to be hacked. -=[ 🔴 Stuff I use ]=- → Microphone:* https://amzn.to/2LW6ldx → Graphics tablet:* https://amzn.to/2C8djYj → Camera#1 for streaming:* https://amzn.to/2SJ66VM → Lens for streaming:* https://amzn.to/2CdG31I → Connect Camera#1 to PC:* https://amzn.to/2VDRhWj → Camera#2 for electronics:* https://amzn.to/2LWxehv → Lens for macro shots:* https://amzn.to/2C5tXrw → Keyboard:* https://amzn.to/2LZgCFD → Headphones:* https://amzn.to/2M2KhxW -=[ ❤️ Support ]=- → per Video: https://www.patreon.com/join/liveoverflow → per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ 🐕 Social ]=- → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/ -=[ 📄 P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm. #CTF #Cryptography
Views: 32731 LiveOverflow
MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas continues with cryptography, introducing encryption methods. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 17928 MIT OpenCourseWare
This tutorial will teach you how to encrypt and decrypt messages using the Caesar Cipher.-- Created using PowToon -- Free sign up at http://www.powtoon.com/ . Make your own animated videos and animated presentations for free. PowToon is a free tool that allows you to develop cool animated clips and animated presentations for your website, office meeting, sales pitch, nonprofit fundraiser, product launch, video resume, or anything else you could use an animated explainer video. PowToon's animation templates help you create animated presentations and animated explainer videos from scratch. Anyone can produce awesome animations quickly with PowToon, without the cost or hassle other professional animation services require.
Views: 152878 Lacey Wright
Cryptography-101  Basics of CRYPTOGRAPHY - Overview (in Bangla/Bengali) === Overview Basic terminology Classifications Substitution and transposition techniques Brute force and Cryptanalysis attack Cryptanalysis attacks === Mohammad Mahmud kabir MahmudKabir.com
Views: 229 Mahmud Kabir
Today we’re going to discuss how 3D graphics are created and then rendered for a 2D screen. From polygon count and meshes, to lighting and texturing, there are a lot of considerations in building the 3D objects we see in our movies and video games, but then displaying these 3D objects of a 2D surface adds an additional number of challenges. So we’ll talk about some of the reasons you see occasional glitches in your video games as well as the reason a dedicated graphics processing unit, or GPU, was needed to meet the increasing demand for more and more complex graphics. Pre-order our limited edition Crash Course: Computer Science Floppy Disk Coasters here! https://store.dftba.com/products/computer-science-coasters Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know more about Carrie Anne? https://about.me/carrieannephilbin The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV Want to find Crash Course elsewhere on the internet? Facebook - https://www.facebook.com/YouTubeCrash... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 194761 CrashCourse
Just what are elliptic curves and why use a graph shape in cryptography? Dr Mike Pound explains. Mike's myriad Diffie-Hellman videos: https://www.youtube.com/playlist?list=PLzH6n4zXuckpoaxDKOOV26yhgoY2S-xYg https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 177730 Computerphile
A visual cryptography scheme (VCS) is a kind of secret sharing scheme which allows the encoding of a secret image into shares distributed to participants. The beauty of such a scheme is that a set of qualified participants is able to recover the secret image without any cryptographic knowledge and computation devices. An extended visual cryptography scheme (EVCS) is a kind of VCS which consists of meaningful shares (compared to the random shares of traditional VCS). In this paper, we propose a construction of EVCS which is realized by embedding random shares into meaningful covering shares, and we call it the embedded EVCS. Experimental results compare some of the well-known EVCSs proposed in recent years systematically, and show that the proposed embedded EVCS has competitive visual quality compared with many of the well-known EVCSs in the literature. In addition, it has many specific advantages against these well-known EVCSs, respectively.
Views: 817 Zit Campus
So we've talked a lot in this series about how computers fetch and display data, but how do they make decisions on this data? From spam filters and self-driving cars, to cutting edge medical diagnosis and real-time language translation, there has been an increasing need for our computers to learn from data and apply that knowledge to make predictions and decisions. This is the heart of machine learning which sits inside the more ambitious goal of artificial intelligence. We may be a long way from self-aware computers that think just like us, but with advancements in deep learning and artificial neural networks our computers are becoming more powerful than ever. Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know more about Carrie Anne? https://about.me/carrieannephilbin The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV Want to find Crash Course elsewhere on the internet? Facebook - https://www.facebook.com/YouTubeCrash... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 438964 CrashCourse
In this video, you will see Secure Hash Algorithm (SHA) explained simply for beginners! Understanding the concept of a Secure Hash Algorithm (SHA) is crucial in order to understand blockchain, bitcoin, and other cryptocurrencies. The term "hashing" is thrown around everywhere, and I want to make it super clear what exactly this term means! Cited: Graphic from BlockGeeks, credit to them for that slide! ------------------------------------------------------------------------------------------------------------- Pick up a Ledger Nano S Here: https://www.ledgerwallet.com/r/b852?path=/products/ledger-nano-s&tracker=MY_TRACKER ------------------------------------------------------------------------------------------------------------- If you want to get in the cryptocurrency game, sign up for Coinbase with my referral link: https://www.coinbase.com/join/590795469dcf5f0906c65a13 ------------------------------------------------------------------------------------------------------------- Also, sign up for Binance with my referral link here: https://www.binance.com/?ref=23509073 ☮ Thank you for watching and joining the movement! I post weekly content about blockchain, cryptocurrency and more, including cryptocurrency investment tips, product reviews, and informative lessons, so please consider subscribing to get updated on the latest content! ☮ **-----------------------------------------------------------------------------------------------------DISCLAIMER: The information in this video is an opinion and is for informational purposes only. It is not intended to be investment advice, nor does it represent any entity's opinion but my own. Seek a duly licensed professional for investment advice. I am not guaranteeing you gains on your investment and this is just my own personal approach that I’ve had success with in investing in cryptocurrency. What I can guarantee, is that by using the above questions as your guide, make the most educated decisions possible while investing in cryptocurrency! Invest smart, ladies and gentlemen! This video and description may contain affiliate links, which means that if you click on one of the product links, I’ll receive a small commission. Most often, I include links to products when I do product reviews, but I will never push a product I do not use myself and totally believe in! The commission I receive for clicks is directly reinvested into the creation of great content on this channel, and I thank you for your support. I am @hashoshi4, engage with me on social media :) Twitter: http://bit.ly/2EDnBjp Facebook: http://bit.ly/2CvViW8 Instagram: http://bit.ly/2ECkecO *--------------------------------------------------------------------------------------------------------* I am Forrest Colyer, and I have studied blockchain and cryptocurrency obsessively over the last 7 years and worked as a blockchain developer for the past few years. It has been a wild ride and I'm excited about what the future holds! On this channel, I strive to share my experience with you in the form of blockchain tutorials, lessons, and stories as well as cryptocurrency news and investment hacks/tips. Thank you for watching and supporting me; Let's Hash It Out!
Views: 452 Hashoshi
Learn different types of firewall, types of firewall software, types of hardware firewall, different types of firewalls, types of firewalls, types firewall, types of firewalls in network security, different types of hardware firewalls, types of firewall, different types of firewall, firewall configuration types, firewall types, 7 types of firewall, types of firewall in network security, types of firewall with diagram, firewall and types of firewall, types of network firewalls, firewall and its types, what is firewall and types of firewall, types of firewall architecture, types of firewall in networking, different types of firewall in network security, what is firewall and write the types of firewall, types of firewall attacks, firewall and types, firewall types and configuration, different types of firewalls and their functions. Follow us on Facebook: https://www.facebook.com/DGTechTerms/ Follow us on Twitter: https://twitter.com/Technical_Terms Firewalls protect our computers from internet hackers. Internet hackers can steal our bank details from our computers and can reduce our bank balance from 1000s of dollars to 0 in seconds. So, firewall is must in a computer / computer network. Starting with packet filtering firewall. Suppose, I am downloading a file from internet. When the data-packet arrives a packet-filtering firewall, it only checks sender’s and receiver’s IP address and the port number. If the everything is OK, then data packet is allowed to pass through packet-filtering firewall and then to my computer. This checking process is done as per rules written in a list called access control list. The only limitation (caveats) of packet filtering firewall is that it do not checks the data portion, i.e. Payload, of the data packet. So, a hacker could send some malicious data packed in this payload section. The 2nd one is application / proxy firewall: proxy firewall do not let the web server know which computer actually wants to visit the requested website, i.e. proxy firewall hides us from the attackers in internet. Since, the application firewalls also check the data contents of the received data packet so they are generally much slower than packet-filtering firewalls. 3rd is Hybrid firewalls: Hybrid firewalls combines packet filtering firewall and application firewall in series to enhance the security. If they are connected in parallel then the security of the connection will be reduced to the parameters defined by the packet filtering firewall, i.e. application firewall will be of no use if the two firewalls are connected in parallel. For this reason, hybrid firewalls use packet filtering and application firewall in series. -~-~~-~~~-~~-~- Please watch: "Computer Network Administrator – 5 Important Questions and answers" https://www.youtube.com/watch?v=4mKcQ1_vQjc -~-~~-~~~-~~-~-
Views: 286397 TechTerms
Learn more advanced front-end and full-stack development at: https://www.fullstackacademy.com Elliptic Curve Cryptography (ECC) is a type of public key cryptography that relies on the math of both elliptic curves as well as number theory. This technique can be used to create smaller, faster, and more efficient cryptographic keys. In this Elliptic Curve Cryptography tutorial, we introduce the mathematical structure behind this new algorithm. Watch this video to learn: - What Elliptic Curve Cryptography is - The advantages of Elliptic Curve Cryptography vs. old algorithms - An example of Elliptic Curve Cryptography
Views: 13004 Fullstack Academy
Get your first two months of CuriosityStream free by going to http://curiositystream.com/crashcourse and using the promo code “crashcourse”. So last episode we talked about some basic file formats, but what we didn’t talk about is compression. Often files are way too large to be easily stored on hard drives or transferred over the Internet - the solution, unsurprisingly, is to make them smaller. Today, we’re going to talk about lossless compression, which will give you the exact same thing when reassembled, as well as lossy compression, which uses the limitations of human perception to remove less important data. From listening to music and sharing photos, to talking on the phone and even streaming this video right now the ways we use the Internet and our computing devices just wouldn’t be possible without the help of compression. Pre-order our limited edition Crash Course: Computer Science Floppy Disk Coasters here! https://store.dftba.com/products/computer-science-coasters Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know more about Carrie Anne? https://about.me/carrieannephilbin The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV Want to find Crash Course elsewhere on the internet? Facebook - https://www.facebook.com/YouTubeCrash... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 191513 CrashCourse
What is a blockchain and how do they work? I'll explain why blockchains are so special in simple and plain English! 💰 Want to buy Bitcoin or Ethereum? Buy for $100 and get $10 free (through my affiliate link): https://www.coinbase.com/join/59284524822a3d0b19e11134 📚 Sources can be found on my website: https://www.savjee.be/videos/simply-explained/how-does-a-blockchain-work/ 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be ✉️ Subscribe to newsletter: https://goo.gl/nueDfz 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Views: 2932415 Simply Explained - Savjee
Learn how firewalls actually work, Network Security, packet filtering firewall, stateful inspection firewall, proxy firewall and why we need firewall security in our network. Learn network firewall security, network security firewall, firewall security, network firewall, what does a firewall do, what is a firewall, firewall, stateful firewall, windows firewall, what is firewall, firewall protection, firewall meaning, what do firewalls protect against, learn more about firewalls, firewall security network, firewall for network, What’s firewall, what does a firewall protect your company against, firewall network protection, firewall packet filtering. facebook page : https://www.facebook.com/DGTechTerms/ You will find answers to these questions : working of firewall windows firewall why we need firewall in network why we need firewall why use firewall why use a firewall why is a firewall important why firewall why do we need firewall why are firewalls used where is firewall what's firewall whats firewall what's a firewall on a computer what's a firewall whats a firewall what is windows firewall what is use of firewall what is the use of firewall what is the role of firewall in network security what is the role of a firewall what is the purpose of firewall software what is the purpose of firewall what is the purpose of a firewall what is the meaning of firewall what is the main purpose of a firewall what is the function of firewall what is the function of a firewall what is the firewall in computer what is the firewall what is the fire wall what is the definition of firewall what is software firewall what is network firewall what is my firewall what is meant by firewall what is internet firewall what is hardware firewall what is firewall used for what is firewall software what is firewall security what is firewall protection what is firewall on computer what is firewall on a computer what is firewall in networking and how it works what is firewall in networking what is firewall in network security what is firewall in computer security what is firewall in computer network what is firewall in computer what is firewall how does it work what is firewall for what is firewall and write the types of firewall what is firewall and why is it necessary what is firewall and its types what is firewall and how it works what is firewall what is computer firewall what is an firewall what is a proxy firewall what is a network firewall what is a hardware firewall what is a firewall used for what is a firewall software what is a firewall on computer what is a firewall on a computer what is a firewall in networking what is a firewall in computers what is a firewall in computer terms what is a firewall in computer network what is a firewall for computers what is a firewall for what is a firewall computer what is a firewall and why is it necessary what is a firewall and what is its function what is a firewall and what does it do what is a firewall and how does it work what is a firewall what is a computer firewall and how does it work what is a computer firewall what firewall does what does the firewall do what does network firewall mean what does firewall software do what does firewall mean in computer terms what does firewall mean what does firewall do what does a firewall protect your company against what does a firewall protect you from what does a firewall protect against what does a firewall protect what does a firewall do to protect your computer what does a firewall do what does a computer firewall do what do you mean by firewall what do firewalls protect your computer from what do firewalls protect against what can a firewall protect against what can a firewall do what are firewalls used for what are firewalls in computers what are firewalls what a firewall is and why it is necessary what a firewall does uses of firewall in networking uses of firewall in computer uses of firewall use of firewall in networking use of firewall in network security use of firewall in computer use of firewall use firewall understanding firewalls types of software firewalls types of firewalls types of firewall software types of firewall in network security types of firewall turn firewall on the fire wall the definition of firewall system firewall stateful inspection firewall stateful firewall software firewall for network software firewall software based firewall short note on firewall server firewall security firewall -~-~~-~~~-~~-~- Please watch: "Computer Network Administrator – 5 Important Questions and answers" https://www.youtube.com/watch?v=4mKcQ1_vQjc -~-~~-~~~-~~-~-
Views: 138285 TechTerms
Hacking is hard. It takes passion, dedication, and an unwavering attention to detail. Hacking requires a breadth of knowledge spread across many domains. We need to have experience with different platforms, operating systems, software packages, tools, programming languages, and technology trends. Being overly deficient in any one of these areas can add hours to our hack, or even worse, bring us total failure. And while all of these things are important for a well-rounded hacker, one of the key areas that is often overlooked is cryptography. In an era dominated by security breaches, an understanding of encryption and hashing algorithms provides a tremendous advantage. We can better hone our attack vectors, especially when looking for security holes. A few years ago I released the first Blu-Ray device key, AA856A1BA814AB99FFDEBA6AEFBE1C04, by exploiting a vulnerability in an implementation of the AACS protocol. As hacks go, it was a simple one. But it was the knowledge of crypto that made it all possible. This presentation is an overview of the most common crypto routines helpful to hackers. We'll review the strengths and weaknesses of each algorithm, which ones to embrace, and which ones to avoid. You'll get C++ code examples, high-level wrapper classes, and an open-source library that implements all the algorithms. We'll even talk about creative ways to merge algorithms to further increase entropy and key strength. If you've ever wanted to learn how crypto can give you an advantage as a hacker, then this talk is for you. With this information you'll be able to maximize your hacks and better protect your personal data. Speaker Bio: Eijah is the founder of demonsaw, a secure and anonymous content sharing platform, and a Senior Programmer at a world-renowned game development studio. He has over 15 years of software development and IT Security experience. His career has covered a broad range of Internet and mid-range technologies, core security, and system architecture. Eijah has been a faculty member at multiple colleges, has spoken about security and development at conferences, and holds a master’s degree in Computer Science. Eijah is an active member of the hacking community and is an avid proponent of Internet freedom.
Views: 48442 DEFCONConference
Here i am explaining about Spywares, How Spywares harm your computer system and confidential data. Watch the video to know more. and make sure you subscribe to my channel for more videos like this. Thanks !
Views: 48136 Technical Sagar
Learn more advanced front-end and full-stack development at: https://www.fullstackacademy.com Elliptic Curve Cryptography (ECC) is a type of public key cryptography that relies on the math of both elliptic curves as well as number theory. This technique can be used to create smaller, faster, and more efficient cryptographic keys. In this Elliptic Curve Cryptography tutorial, we build off of the Diffie-Hellman encryption scheme and show how we can change the Diffie-Hellman procedure with elliptic curve equations. Watch this video to learn: - The basics of Elliptic Curve Cryptography - Why Elliptic Curve Cryptography is an important trend - A comparison between Elliptic Curve Cryptography and the Diffie-Hellman Key Exchange
Views: 24400 Fullstack Academy
MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas continues with the topic of network flow. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 19334 MIT OpenCourseWare
-- Created using PowToon -- Free sign up at http://www.powtoon.com/youtube/ -- Create animated videos and animated presentations for free. PowToon is a free tool that allows you to develop cool animated clips and animated presentations for your website, office meeting, sales pitch, nonprofit fundraiser, product launch, video resume, or anything else you could use an animated explainer video. PowToon's animation templates help you create animated presentations and animated explainer videos from scratch. Anyone can produce awesome animations quickly with PowToon, without the cost or hassle other professional animation services require.
Views: 72 yurnx yunie
Before we can measure the efficiency of an algorithm, we must understand how to define size (space) and speed (time). Follow along on Khan Academy: http://www.khanacademy.org/science/brit-cruise/number-theory/v/time-space-complexity--prime-number-adventure-part-2
Views: 14527 Art of the Problem
Is quantum computing a threat to Bitcoin? How can Bitcoin become more secure against a quantum computing attack? Will this upgrade require moving coins to new addresses? Will it be implemented as a soft or hard fork? What happens to coins controlled by lost keys? CORRECTION: Apologies for the confusion - regarding the question of whether Satoshi's (suspected) coins would be vulnerable to a quantum computing attack on ECDSA, the correct answer is in the first clip at 3:05. While what I initially say at 6:10 is true, that Satoshi did not spend their coins, those coinbase transactions still used pay-to-public-key (P2PK) instead of pay-to-public-key-hash (P2PKH), which means the public keys are already exposed. More about hashing and public key cryptography in Bitcoin: https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch04.asciidoc These questions are from the May monthly Patreon session and part of the Denver talk, which took place on May 26th and August 6th 2018 respectively. If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron: https://www.patreon.com/aantonop RELATED: Advanced Bitcoin Scripting, Part 1: Transactions and Multisig - https://youtu.be/8FeAXjkmDcQ Advanced Bitcoin Scripting, Part 2: SegWit, Consensus, and Trustware - https://youtu.be/pQbeBduVQ4I Migrating to post-quantum cryptography What is a private key? - https://youtu.be/xxfUpIV9wRI Public keys vs. addresses - https://youtu.be/8es3qQWkEiU Protocol development security - https://youtu.be/4fsL5XWsTJ4 Lightning's security model - https://youtu.be/_GNsT_ufkec Misconceptions about the Lightning Network - https://youtu.be/c4TjfaLgzj4 Eltoo, and the early days of Lightning - https://youtu.be/o6eFZ5aI9N0 Lightning Network scaling - https://youtu.be/4KiWkwo48k0 Lightning Network interoperability - https://youtu.be/1HYMWcJHGXc Lightning Network game theory - https://youtu.be/7if0DuTtozY Atomic swaps - https://youtu.be/fNFBA2UmUmg Full node and home network security - https://youtu.be/uo58zmyXqFY Running nodes and payment channels - https://youtu.be/ndcfBfE_yoY What is Segregated Witness (SegWit)? - https://youtu.be/dtOjjB4mD8k SegWit and fork research - https://youtu.be/OorLoi01KEE Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin. Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. THE INTERNET OF MONEY, v1: https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8 [NEW] THE INTERNET OF MONEY, v2: https://www.amazon.com/Internet-Money-Andreas-M-Antonopoulos/dp/194791006X/ref=asap_bc?ie=UTF8 MASTERING BITCOIN: https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042 [NEW] MASTERING BITCOIN, 2nd Edition: https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388 Translations of MASTERING BITCOIN: https://bitcoinbook.info/translations-of-mastering-bitcoin/ Subscribe to the channel to learn more about Bitcoin & open blockchains! Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
Views: 11959 aantonop
Hashing Techniques Hash Function, Types of Hashing Techniques in Hindi and English * Direct Hashing * Modulo-Division Hashing * Mid-Square Hashing * Folding Hashing - Fold-Shift Hashing and Fold Boundary Hashing * PseudoRandom Hashing * Subtraction Hashing For Students of B.Tech, B.E, MCA, BCA, B.Sc., M.Sc., Courses - As Per IP University Syllabus and Other Engineering Courses
Views: 265390 Easy Engineering Classes
The field of computer science summarised. Learn more at this video's sponsor https://brilliant.org/dos Computer science is the subject that studies what computers can do and investigates the best ways you can solve the problems of the world with them. It is a huge field overlapping pure mathematics, engineering and many other scientific disciplines. In this video I summarise as much of the subject as I can and show how the areas are related to each other. You can buy this poster here: North America: https://store.dftba.com/products/map-of-computer-science-poster Everywhere else: https://www.redbubble.com/people/dominicwalliman/works/27929629-map-of-computer-science?p=poster&finish=semi_gloss&size=small Get all my other posters here: https://www.redbubble.com/people/dominicwalliman A couple of notes on this video: 1. Some people have commented that I should have included computer security alongside hacking, and I completely agree, that was an oversight on my part. Apologies to all the computer security professionals, and thanks for all the hard work! 2. I also failed to mention interpreters alongside compilers in the complier section. Again, I’m kicking myself because of course this is an important concept for people to hear about. Also the layers of languages being compiled to other languages is overly convoluted, in practice it is more simple than this. I guess I should have picked one simple example. 3. NP-complete problems are possible to solve, they just become very difficult to solve very quickly as they get bigger. When I said NP-complete and then "impossible to solve", I meant that the large NP-complete problems that industry is interested in solving were thought to be practically impossible to solve. And free downloadable versions of this and the other posters here. If you want to print them out for educational purposes please do! https://www.flickr.com/photos/[email protected]/ Thanks so much to my supporters on Patreon. If you enjoy my videos and would like to help me make more this is the best way and I appreciate it very much. https://www.patreon.com/domainofscience I also write a series of children’s science books call Professor Astro Cat, these links are to the publisher, but they are available in all good bookshops around the world in 18 languages and counting: Frontiers of Space (age 7+): http://nobrow.net/shop/professor-astro-cats-frontiers-of-space/ Atomic Adventure (age 7+): http://nobrow.net/shop/professor-astro-cats-atomic-adventure/ Intergalactic Activity Book (age 7+): http://nobrow.net/shop/professor-astro-cats-intergalactic-activity-book/ Solar System Book (age 3+, available in UK now, and rest of world in spring 2018): http://nobrow.net/shop/professor-astro-cats-solar-system/? Solar System App: http://www.minilabstudios.com/apps/professor-astro-cats-solar-system/ And the new Professor Astro Cat App: https://itunes.apple.com/us/app/galactic-genius-with-astro-cat/id1212841840?mt=8 Find me on twitter, Instagram, and my website: http://dominicwalliman.com https://twitter.com/DominicWalliman https://www.instagram.com/dominicwalliman https://www.facebook.com/dominicwalliman
Views: 1727721 Domain of Science
I've had a lot of requests to cover the recent announcement that a Chinese research team has successfully delivered entangle photon pairs to locations separated 1000km. The press and speculation has been a little misleading so here's my explanation of how this works and what it means. This video is my second attempt - here' my original voiceover without graphics for those who are curious. https://www.youtube.com/watch?v=CfInxdjWRZA
Views: 48151 Scott Manley
first of all i want to thank you for supporting last moment tuition so much its not only me who create last moment tuition its we without your support i m nothing please give me some good improvement ideas so that i can give you best -~-~~-~~~-~~-~- Please watch: "Boats and stream advance problem Tricks and tips part 2" https://www.youtube.com/watch?v=Z5D1fiLb7Fk -~-~~-~~~-~~-~-
Views: 31900 Last moment tuitions