This part of ISO/IEC 10118 specifies hash-functions which make use of an n-bit block cipher algorithm. They are therefore suitable for an environment in which such an algorithm is already implemented.
Two types of hash-functions are specified. The first provides ha sh-codes of length smaller than or equal to n, where n is the block-length of the algorithm used. The second provides hash- codes of length less than or equal to 2n.