This document describes how to implement a 32-bit CRC algorithm efficiently. By efficiently I mean about twice as fast as any previous algorithm that I have come across. I'm not necessarily implying that this is a world first.

This document explains a little of the maths, but although I
understand it, I don't understand it
well enough to explain it properly. This is a document for C hackers,
not mathematicians. Flames from mathematicians will be forwarded to
`/dev/null`.

Richard Black