22-Step Collisions for SHA-2
Somitra Kumar Sanadhya, Palash Sarkar
TL;DR
This paper reports the first known collisions for 22-step versions of SHA-256 and SHA-512, demonstrating vulnerabilities in reduced-round variants of these hash functions.
Contribution
It introduces the first 22-step collision attacks on SHA-256 and SHA-512, advancing understanding of their security margins.
Findings
First 22-step collisions for SHA-256 and SHA-512
Highlights potential vulnerabilities in reduced-round SHA-2
Sets groundwork for future cryptanalysis of full SHA-2
Abstract
In this note, we provide the first 22-step collisions for SHA-256 and SHA-512. Detailed technique of generating these collisions will be provided in the next revision of this note.
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Taxonomy
TopicsCryptographic Implementations and Security · Peptidase Inhibition and Analysis · Integrated Circuits and Semiconductor Failure Analysis