Abstract
Grostl is one of 14 second round candidates of the NIST SHA-3 competition. Cryptanalytic results on the wide-pipe compression function of Grostl-256 have already been published. However, little is known about the hash function, arguably a much more interesting cryptanalytic setting. Also, Grostl-512 has not been analyzed yet. In this paper, we show the first cryptanalytic attacks on reduced-round versions of the Grostl hash functions. These results are obtained by several extensions of the rebound attack. We present a collision attack on 4/10 rounds of the Grostl-256 hash function and 5/14 rounds of the Grostl-512 hash functions. Additionally, we give the best collision attack for reduced-round (7/10 and 7/14) versions of the compression function of Grostl-256 and Grostl-512.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
