Computer

Connecting via SSH to a remote machine is second nature to some, but how does it work? Dr Steve Bagley. Dr Mike Pound on Hashing (mentions padding but full video on padding is planned to follow): https://youtu.be/DMtFhACPnTY https://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University
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Diffie Hellman has a flaw. Dr Mike Pound explains how a man in the middle could be a big problem, unless we factor it in… Public Key Cryptography: https://youtu.be/GSIDS_lvRv4 Elliptic Curve Cryptography: Coming Soon! https://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer
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For the past year, we’ve been asking this as a sound-check question. Here are the results! Professor Graham Hutton (Haskell) Joseph Best (BBC Basic) David CX (Java / Python) Lorraine Underwood (PHP) Rob Miles (Python) Charles Arthur (Python) Sarah Spencer (Javascript) Matt Denton (C) Matt Lloyd (C/Python/PHP) Ian Dickinson (C) Tom Sheridan (Python) Spencer Owen
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Main video is at: http://youtu.be/LHSSY8QNvew This is extra footage from Tom Rodden on tracking cookies and some of the controversy surrounding digital data. Video filmed and edited by Sean Riley. Computerphile is a project by Brady Haran. See the full list of Brady’s video projects at: http://periodicvideos.blogspot.co.uk/2012/06/here-are-my-channels.html Computer Science at the University of Nottingham: http://bit.ly/nottscomputer
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Audible free book: http://www.audible.com/computerphile Why can’t artificial intelligence do what humans can? Rob Miles talks about generality in intelligence. Sean Comments/Questions (For those who can’t hear him clearly) 11secs: “This was the hill climbing algorithm?” 2min 40sec: “recently with Professor Brailsford we did the idea of The Turing Test, so that strikes me from what
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We look at and run the code that exploits the Heartbleed bug. Dr. Steven Bagley takes us through the code and shows us how it works. Relevant RFC Document: http://bit.ly/heartbleed-rfc Domino Addition: http://youtu.be/lNuPy-r1GuQ YouTube’s Secret Algorithm: http://youtu.be/BsCeNCVb-d8 http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University
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Secure Hashing Algorithm (SHA1) explained. Dr Mike Pound explains how files are used to generate seemingly random hash strings. EXTRA BITS: https://youtu.be/f8ZP_1K2Y-U Tom Scott on Hash Algorithms: https://youtu.be/b4b8ktEV4Bg http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to
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10% off at Squarespace: http://squarespace.com/computerphile Secret services want to read people’s communications, politicians talk about terrorists, but what’s the reality of banning encryption? Ross Anderson, Professor of Security Engineering at the Computer Laboratory, University of Cambridge explains how history repeats itself. The Dress: https://youtu.be/Tw0PlGpaqy4 The VR Cave: https://youtu.be/STMcWUtQr1Y Public Key Cryptography: https://youtu.be/GSIDS_lvRv4 Alan Turing and
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Extra Bits of material about punch cards from Professor Brailsford. Original Punch Cards Film: http://youtu.be/KG2M4ttzBnY Extra Material – behind the scenes: http://youtu.be/Wi326Leuemg http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran’s Numberphile. See the full
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Reverse Polish, or Postfix notation is commonly used in Computer Science, particularly in reference to Stacks – but what are stacks and how does postfix work? Professor David Brailsford takes us through it. Upside Down (Huffman) Trees: http://youtu.be/umTbivyJoiI Quick Sort: http://youtu.be/XE4VP_8Y0BU Getting Sorted: http://youtu.be/kgBjXUE_Nwc http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by
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Removing voxels until the shape emerges. Space Carving is a kind of virtual sculpture. Image Analyst Dr Mike Pound explains how though it’s a bit rough and ready, it can be lightning fast. Rob Miles on Game Playing AI: https://youtu.be/5oXyibEgJr0 Deep Learning: https://youtu.be/l42lr8AlrHk Secure Web Browsing: https://www.youtube.com/watch?v=E_wX40fQwEA Thanks to Rick van de Zedde, Wageningen UR
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XOR encryption is flawed. Professor Brailsford explains the zig-zag method that can reveal the precious key stream. Fishy Codes – Bletchley’s Other Secret: https://youtu.be/Ou_9ntYRzzw XOR and the Half Adder: https://youtu.be/VPw9vPN-3ac Colossus & Bletchley Park: https://youtu.be/9HH-asvLAj4 5 Hole Paper Tape: https://youtu.be/JafQYA7vV6s The Professor’s Supporting Documents: Sean/Dave ZigZag document: http://bit.ly/computerphileZigZag C Program to play with: http://bit.ly/ComputerphileZigZagCprog The
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What does a GPU do differently to a CPU and why don’t we use them for everything? First of a series from Jem Davies, VP of Technology at ARM. Floating Point Numbers: http://youtu.be/PZRI1IfStY0 Why Computers Use Binary: https://youtu.be/thrx3SBEpL8 How Bitcoin Works: https://youtu.be/JyxRH18YlpA Triangles & Pixels (Graphics Playlist): https://www.youtube.com/playlist?list=PLzH6n4zXuckrPkEUK5iMQrQyvj9Z6WCrm http://www.facebook.com/computerphile Tweets by computer_phile This video was
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Colossus was one of the very first electronic, special purpose, computers and it was created almost two years earlier than the better known ENIAC. We visit Bletchley Park, home of the code breakers, and TNMoC, The National Museum of Computing. Professor Brailsford shows us the Colossus replica. The Most Difficult Program to Compute?: https://youtu.be/i7sm9dzFtEI Computer
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Turing Machines are the basis of modern computing, but what actually is a Turing Machine? Assistant Professor Mark Jago explains. Turing & The Halting Problem: http://youtu.be/macM_MtS_w4 Busy Beavers: https://youtu.be/CE8UhcyJS0I Avatars & In-Flight VR: http://youtu.be/TLKqKlrQv4s The (pink) VR Simulator: http://youtu.be/Lm0lA0enPSk http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at
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JPEG Isn’t a file format. Image Analyst Mike Pound explains why not in our first in a series about how JPEG works. Colourspaces: https://youtu.be/LFXN9PiOGtY Elegant Compression (The LZ Method): https://youtu.be/goOa3DGezUA Capturing Digital Images (The Bayer Filter): https://youtu.be/LWxu4rkZBLw Discrete Cosine Transform: https://youtu.be/Q2aEzeMDHMA http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer
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No internet, no networking; just a screen and a keyboard, or a pile of cards to punch holes in; mainframes were a world apart from today’s smartphones and integrated circuits. Professor Brailsford remembers the Unix revolution. To hear about the omission of Gnu and Richard Stallman: http://youtu.be/Wi326Leuemg ICL computer photographs courtesy of couperus.org ICL punch-card
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How well sorted is your algorithm? Choosing the right method to sort numbers has a huge effect on how quickly a computer can process a task. Alex Pinkney talks about two popular sorting algorithms and how they ‘scale up.’ Follow up film “Quick Sort”: http://youtu.be/XE4VP_8Y0BU Alex’s code that generated the data for the tests: https://github.com/apinkney97/Sorts
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Nearest Neighbour and BiLinear resize explained by Dr Mike Pound Fire Pong: https://youtu.be/T6EBe_5LxO8 Google Deep Dream: https://youtu.be/BsSmBPmPeYQ FPS & Digital Video: https://youtu.be/yniSnYtkrwQ http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran’s Numberphile. More at http://www.bradyharan.com
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Hitler’s High Command didn’t use Enigma, they used a faster system called Lorenz, but when Allied forces first encountered it, they had no idea what it was and code-named it ‘Tunny’ (Tuna). Professor Brailsford explains why this relates to the early days of Computer Science Next Video in this series: https://youtu.be/yxx3Bkmv3ck The Professor’s Notes: Undulator
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Never use JPEG with text. But why? Image Analyst Mike Pound explains what goes wrong when JPEG tries to compress text. Holy Grail of AI: https://youtu.be/tlS5Y2vm02c Computer That Changed Everything: https://youtu.be/6LYRgrqJgDc Arduino Hardware: https://youtu.be/b4z1zkmo1BE How JPEG Works: https://www.youtube.com/playlist?list=PLzH6n4zXuckoAod3z31QEST1ZaizBuNHh http://www.facebook.com/computerphile Tweets by computer_phile This video was filmed and edited by Sean Riley. Computer Science at the
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Harry’s: http://www.harrys.com/ use coupon code “COMPUTERPHILE” for $5 off What’s a colourspace and why do we have different ones? It’s horses for courses as Image Analyst Mike Pound explains. Digital Images: https://www.youtube.com/playlist?list=PLzH6n4zXuckpbNdFO2WW78evpMBqgqyp8 Atari ST: Pushing the Limits: https://youtu.be/3OdtfsXOkEY Professor Steve Furber on ARM: COMING SOON! Universe of Triangles: https://www.youtube.com/playlist?list=PLzH6n4zXuckrPkEUK5iMQrQyvj9Z6WCrm http://www.facebook.com/computerphile Tweets by computer_phile This video
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