Lenovo sold thousands of computers all carrying the Superfish software. Tom Scott explains what a security nightmare this became. More Tom Scott: null http://www.twitter.com/tomscott CORRECTION: At 2min 46secs Tom says "Private Key" when he means "Public Key" - The private key is not shared. Chip & PIN Fraud: https://www.youtube.com/watch?v=Ks0SOn8hjG8 Could We Ban Encryption?: https://www.youtube.com/watch?v=ShUyfk4QB-8 How Blurs & Filters work: https://www.youtube.com/watch?v=C_zFhWdM4ic Numberphile: Encryption & Huge Numbers : https://www.youtube.com/watch?v=M7kEpw1tn50 Public Key Cryptography: https://www.youtube.com/watch?v=GSIDS_lvRv4 http://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: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com/