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Paper 2015/1085
Malicious Keccak
Pawel Morawiecki
Abstract
In this paper, we investigate Keccak --- the cryptographic hash function adopted as the SHA-3 standard. We propose a malicious variant of the function, where new round constants are introduced. We show that for such the variant, collision and preimage attacks are possible. We also identify a class of weak keys for the malicious Keccak working in the MAC mode. Ideas presented in the paper were verified by implementing the attacks on the function with the 128-bit hash.
Metadata
- Available format(s)
- Category
- Secret-key cryptography
- Publication info
- Preprint. MINOR revision.
- Keywords
- cryptanalysisKeccakSHA-3malicious hashing
- Contact author(s)
- pawel morawiecki @ gmail com
- History
- 2015-11-09: received
- Short URL
- https://ia.cr/2015/1085
- License
-
CC BY