1. A method for use in determining a residue of a message, m(x), the method comprising: loading at least a portion of each of a set of polynomials derived from a first polynomial, g(x); and determining the residue for the message corresponding to m(x) mod g(x) using a set of stages, individual ones of the stages applying at least a portion of a respective one of the set of polynomials to data output by a preceding one of the set of stages.