Cryptography General Interview Question:

What Other Hash Functions Are There?

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For a brief overview here, we note that hash functions are often divided into three classes according to their design:

those built around block ciphers,
those which use modular arithmetic, and
those which have what is termed a "dedicated" design.

By building a hash function around a block cipher, it is intended that by using a well-trusted block cipher such as DES a secure and well-trusted hash function can be obtained. The so-called Davies-Meyer hash function is an example of a hash function built around the use of DES.
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