CHES 2024

CHES Challenge

Since 2015, a crypto-engineering challenge is organized every year in cooperation with CHES.

The WhibOx contest is back for a 4th edition focusing on ECDSA as last edition.

You think you can obfuscate an ECDSA signature implementation and make its secret key hard to extract? You'd like to break white-box ECDSA candidates? This challenge is made for you!

The WhibOx contest, edition 2024, is a white-box cryptography competition organized as the CHES 2024 challenge. The contest will take place from May 26 to September 1, 2024.

As previous editions, the competition challenges two categories of competitors:

• Coders are invited to post candidate white-box implementations computing an ECDSA signature (on NIST P256 curve) from input message digest under a freely chosen secret key. The signature algorithm shall be deterministic with a freely chosen nonce derivation mechanism. Candidate implementations are expected to resist key extraction when submitted to white-box attackers.
• Attackers are invited to break the submitted implementations i.e. extract their hard-coded signing key. Contestants are free to remain anonymous. Coders are not expected to explain their designs, but only to provide a C source code of the white-box implementation. Attackers are not expected to explain their techniques, but only to recover embedded key(s).

The winners of the challenge will be awarded with fame and a total 2000$ cash prize.

For more information, please visit the WhibOx Contest 2024 website.

CHES Challenge Contact

matthieu.rivain@cryptoexperts.com