Thanks for your interest in the Underhanded Crypto Contest; a competition to discover and document the best ways to subtly subvert crypto code. This is intended to be an annual competition, each year with different challenges and new targets.

Contest Organizers

Information on previous contests can be found on the archive page.

If you are interested in sponsoring the contest by providing prizes or financial support, please contact us via email: [email protected]

If you would like to support the contest (hosting fees, shipping prizes, etc.), you can donate using Bitcoin by sending to this address:


2016 Sponsors




NCC Group Logo


Hosting and support provided by Shackle Labs.