Page "Hash function" Paragraph 52

This schema is also used in many text checksum and fingerprint algorithms.

The state variable S may be a 32-or 64-bit unsigned integer ; in that case, S0 can be 0, and G ( S, n ) can be just S mod n. The best choice of F is a complex issue and depends on the nature of the data.

If the units b are single bits, then F ( S, b ) could be, for instance