Practical Near-Collisions for Reduced Round Blake, Fugue, Hamsi and JH
Meltem Sonmez Turan, Erdener Uyan
A hash function is near-collision resistant, if it is hard to find two messages with hash values that differ in only small number of bits. In this study, we used hill climbing methods to find near-collisions for some of the second round SHA-3 candidates. We practically obtained (i) 72-bit near-collision for the 2-round compression function of Blake-32; (ii) 64-bit near-collision for the 2-round compression function of Hamsi-256; (iii) 212-bit near-collisions for 10-round compression function of JH. For the reduced versions of F-256 function in Fugue, collisions and near collisions are observed.
and Uyan, E.
Practical Near-Collisions for Reduced Round Blake, Fugue, Hamsi and JH, The Second SHA-3 Candidate Conference, Santa Barbara, CA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=905988
(Accessed December 4, 2023)