Cryptology ePrint Archive: Report 2008/089

An improved preimage attack on MD2

S{\o}ren S. Thomsen

Abstract: This paper describes an improved preimage attack on the cryptographic hash function MD2. The attack has complexity equivalent to about $2^{73}$ evaluations of the MD2 compression function. This is to be compared with the previous best known preimage attack, which has complexity about $2^{97}$.

Category / Keywords: secret-key cryptography / Hash functions, MD2, preimage attack

Date: received 28 Feb 2008

Contact author: crypto at znoren dk

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Version: 20080228:193436 (All versions of this report)

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