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See also: Algorithms | Hash

MD5 verifies data integrity. MD5 has a hash length of 128-bits. Description and source code for the algorithm can be found in RFC 1321.


Since 1996, analytical breakthroughs have made MD5 suspect for certain uses, because it is easier to find certain kinds of collisions than originally thought. Although MD5 still supposed adequate for some applications, a higher-security alternative is SHA-1 but it is under attack too. No proven (time tested) replacement is in sight yet.