Category2017

2017 Winner: JP Smith and Will Song

The well-deserved winner of the 2017 Underhanded Crypto Contest is JP Smith and Will Song for a curve generator for a SIDH, a post-quantum key exchange. This curve generator appears on the surface to function properly, but in reality in certain circumstances the curve generated isn’t supersingular – this doesn’t pose a threat if the attacker is using classical computers, but...

2017 Runner-Up: Neville Longbottom

In second place for the 2017 Underhanded Crypto Contest is “Neville Longbottom” for an application that uses AES to encrypt data, but has special behavior for long messages. For this entry, the author was awarded a prize of $500 provided by NCC Group Cryptography Services; at the authors request, the prize has been donated to the EFF. From the author: Introduction My submission to the...

Announcing Judges and Prizes for the 2017 Contest

Our sponsors understand the value of the time and creativity you put in to your Underhanded Crypto entry, and they’re backing that up with some awesome prizes for the winners this year. Here they are. The Zcash Prize: 15 ZEC. (See the USD↔ZEC exchange rate on Zchain)     The NCC Group Cryptography Services Prize: $500 (US).   The first-place winner will get to pick whichever...

Get Ready for The 2017 Underhanded Crypto Contest

The Underhanded Crypto Contest is back, and we can’t wait to see all the nifty tricks you’ll come up with to put backdoors into cryptography. Last year we wanted to see backdoors that exclusively related to cryptocurrencies, and we didn’t get much of a response. So, this year, we’re open to any kind of crypto backdoor that you can think of. To give you all a head start...

Rules for the 2017 Underhanded Crypto Contest

Introduction The Underhanded Crypto contest was inspired by the famous Underhanded C Contest, which is a contest for producing C programs that look correct, yet are flawed in some subtle way that makes them behave inappropriately. This is a great model for demonstrating how hard code review is, and how easy it is to slip in a backdoor even when smart people are paying attention. The Underhanded...

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