INCITS/ISO/IEC 10118-4 : 1998

1 Scope
2 Normative reference
3 Terms and definitions
  3.1 From ISO/IEC 10118-1
  3.2 Unique to this part of ISO/IEC 10118
  3.3 Conventions
4 Symbols and abbreviated terms
  4.1 From ISO/IEC 10118-1
  4.2 Unique to this part of ISO/IEC 10118
5 Requirements
6 Variables and values needed for the hash operation
  6.1 The length of the hash-code and of the modulus
  6.2 The modulus of the round-function
  6.3 Initializing value
  6.4 Exponent
  6.5 Reduction-function prime number
7 Hashing procedure
  7.1 Preparation of the data string
  7.2 Application of the round-function
  7.3 The Reduction-function
8 Hash-functions
  8.1 MASH-1
  8.2 MASH-2
Annex A (informative) Examples
Annex B (informative) Additional Information
Annex C (informative) Bibliography

Gives two hash-functions which make use of modular arithmetic. These hash-functions, which are believed to be collision resistant, compress messages of arbitrary but limited length to a hash-code whose length being determined by the length of the prime number used in the reduction function. These hash-functions which are known as MASH 1 and MASH-2 are suitable particularly for environments in which implementations of modular arithmetic of sufficient length are available already. The two hash-functions differ only in the exponent used in the round-function.