Simple integer encryption

Question

Is there a simple algorithm to encrypt integers? That is, a function E(i,k) that accepts an n-bit integer and a key (of any type) and produces another, unrelated n-bit integ

Answer 1

Ayden is an algorithm that I developed. It is compact, fast and looks very secure. It is currently available for 32 and 64 bit integers. It is on public domain and you can get it from http://github.com/msotoodeh/integer-encoder.