Rebound Attacks on Stribog [chapter]

Riham AlTawy, Aleksandar Kircanski, Amr M. Youssef
2014 Lecture Notes in Computer Science  
In August 2012, the Stribog hash function was selected as the new Russian hash standard (GOST R 34.11-2012). Stribog is an AES-based primitive and is considered as an asymmetric reply to the new SHA-3. In this paper we investigate the collision resistance of the Stribog compression function and its internal cipher. Specifically, we present a message differential path for the internal block cipher that allows us to efficiently obtain a 5-round free-start collision and a 7.75 free-start near
more » ... sion for the internal cipher with complexities 2 8 and 2 40 , respectively. Finally, the compression function is analyzed and a 7.75 round semi freestart collision, 8.75 and 9.75 round semi free-start near collisions are presented along with an example for 4.75 round 50 out of 64 bytes near colliding message pair.
doi:10.1007/978-3-319-12160-4_11 fatcat:6tmu3catgbh2hfpzrdcrbelf2y