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MD4 is a message digest algorithm (the fourth in a series) by Professor ] of ]. It implements a cryptographic hash algorithm for use in message integrity checks. It's design has been very influential; ], ]-xxx, ], and others have all been based on this fundamental design. MD4 is a message digest algorithm (the fourth in a series) by Professor ] of ]. It implements a ] for use in message integrity checks. The digest length is 128 bits. Its design has been very influential; ], ]-xxx, ], and others have all been based on this fundamental design.


Unfortunately, MD4 was shown to be insecure by ???? and so it should not be used. Many of the message digest designs based on it remain secure, in the sense that no effective attack has been discovered (or rather published!) against them. At this writing, they include: ] (the first version, SHA, was withdrawn by ] due to a 'newly discovered flaw'), ], and ]. Unfortunately, MD4 was shown to be insecure by ???? and so it should not be used. Many of the message digest designs based on it remain secure, in the sense that no effective attack has been discovered (or rather published!) against them. At this writing, they include: ] (the first version, SHA, was withdrawn by ] due to a 'newly discovered flaw'), ], and ].

Revision as of 18:06, 5 April 2004

MD4 is a message digest algorithm (the fourth in a series) by Professor Ronald Rivest of MIT. It implements a cryptographic hash algorithm for use in message integrity checks. The digest length is 128 bits. Its design has been very influential; SHA-1, RIPEMD-xxx, MD5, and others have all been based on this fundamental design.

Unfortunately, MD4 was shown to be insecure by ???? and so it should not be used. Many of the message digest designs based on it remain secure, in the sense that no effective attack has been discovered (or rather published!) against them. At this writing, they include: SHA-1 (the first version, SHA, was withdrawn by NSA due to a 'newly discovered flaw'), RIPEMD-160, and MD5.


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