Return to Marc Stevens' research page Single-block collision for MD5 Paper - Single-block collision attack on MD5, Marc Stevens, preprint, 2012, (PDF). In response to the challenge posted in: - Construct MD5 Collisions Using Just A Single Block Of Message, Tao Xie and Dengguo Feng, Cryptology ePrint Archive, Report 2010/643, (PDF). Program The sources can be downloaded here: md5-1block-collision-a