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MD4 is a message digest algorithm (the fourth in a series) designed by Professor Ronald Rivest of MIT. It implements a cryptographic hash function for use in message integrity checks. The digest length is 128 bits. The algorithm has influenced later designs, such as the MD5, SHA and RIPEMD algorithms.

Weaknesses in MD4 were demonstrated by Den Boer and Bosselaers in a paper published in 1991. Many of the subsequent message digest designs based on it remain secure, in the sense that no effective attack has been published against them.

In August 2004, researchers reported generating collisions in MD4 using "hand calculation" .

See also

• MD2

References

• Hans Dobbertin, 1998. Cryptanalysis of MD4. J. Cryptology 11(4): 253–271
• Hans Dobbertin: Cryptanalysis of MD4. Fast Software Encryption 1996: 53–69

External links

• Description of MD4 by Ron Rivest in RFC 1320
• An Attack on the Last Two Rounds of MD4
• Jacksum (a free, platform independent, open source program with various message verification functions, including MD4)

• v
• t
• e

• Cryptographic algorithms