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Hash function Security claim Best attack Publish date Comment MD5: 2 64: 2 18 time : 2013-03-25 This attack takes seconds on a regular PC. Two-block collisions in 2 18, single-block collisions in 2 41.
Functions that lack this property are vulnerable to pre-image attacks. Second pre-image resistance: given an input m 1, it should be hard to find another input m 2 ≠ m 1 such that hash(m 1) = hash(m 2). This property is sometimes referred to as weak collision resistance. Functions that lack this property are vulnerable to second pre-image ...
The MD5 message-digest algorithm is a widely used hash function producing a 128-bit hash value. MD5 was designed by Ronald Rivest in 1991 to replace an earlier hash function MD4, [3] and was specified in 1992 as RFC 1321. MD5 can be used as a checksum to verify data integrity against unintentional corruption.
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MD5: 128 128 512 64 32 64 PANAMA: 256 8736 256 – 32 – RadioGatún: Unlimited [note 6] 58 words 19 words [note 7] – 1–64 [note 8] 18 [note 9] RIPEMD:
In 2009, MD2 was shown to be vulnerable to a collision attack with time complexity of 2 63.3 compression function evaluations and memory requirements of 2 52 hash values. This is slightly better than the birthday attack which is expected to take 2 65.5 compression function evaluations.
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Since version 2.0, the md5deep package contains several different programs able to perform MD5, SHA-1, SHA-256, Tiger192 and Whirlpool digests, each of them named by the digest type followed by the word "deep". Thus, the name may confuse some people into thinking it only provides the MD5 algorithm when the package supports many more.