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Erschienen in:
2013 | OriginalPaper | Buchkapitel
Cryptanalysis of HMAC/NMAC-Whirlpool
verfasst von : Jian Guo, Yu Sasaki, Lei Wang, Shuang Wu
Erschienen in: Advances in Cryptology - ASIACRYPT 2013
Verlag: Springer Berlin Heidelberg
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In this paper, we present universal forgery and key recovery attacks on the most popular hash-based
MAC
constructions,
e.g.
,
HMAC
and
NMAC
, instantiated with an
AES
-like hash function
Whirlpool
. These attacks work with
Whirlpool
reduced to 6 out of 10 rounds in single-key setting. To the best of our knowledge, this is the first result on “original” key recovery for
HMAC
(previous works only succeeded in recovering the equivalent keys). Interestingly, the number of attacked rounds is comparable with that for collision and preimage attacks on
Whirlpool
hash function itself. Lastly, we present a distinguishing-H attack against the full
HMAC
- and
NMAC-Whirlpool
.