A PEDAGOGICAL CIPHER (This paper is the winner of the CRYPTOLOGIA First Annual Undergraduate Paper Competition in Cryptology.)
Richard Outerbridge · Cryptologia · 1982
A method of using almost any simple calculator as a pseudo-random number generator is described in conjunction with a form of polyalphabetic substitution. The result is an interesting illustration of aperiodic stream encryption which might be useful in a course on cryptography or computer security as a tangible introduction to privacy transformations.