Bit flipping a stream cipher could help you hit the Jackpot! But not with HMAC. Dr Mike Pound explains.

Correction : "pseudo" is spelled incorrectly on the graphic.

  / computerphile  
  / 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