!!! Overview
[{$pagename}] (really Merkle–Damgård)is a method of building [collision-resistant|Collision Resistance] [Cryptographic Hash Functions] from collision-resistant one-way compression functions.


[{$pagename}] was used in the design of many popular hash algorithms such as [MD5], [SHA-1] and [SHA-2].

[{$pagename}] was described in [Ralph Merkle]'s Ph.D. thesis in [1979|Year 1979] where he and Ivan Damgård independently proved that the structure is sound: that is, if an appropriate [padding|Padded] scheme is used and the compression function is collision-resistant, then the hash function will also be collision-resistant.[3][4]



!! More Information
There might be more information for this subject on one of the following:
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* [#1] - [Merkle–Damgård_construction|Wikipedia:Merkle–Damgård_construction|target='_blank'] - based on information obtained 2018-08-28-