Title : The Possibility of secure non-secret digital encryption Author : J.H. Ellis Date of publication : January 1970 Address : http://www.cesg.gov.uk/publications/media/nsecret/possnse.pdf Description : The original paper proposed by James Ellis suggesting the possibility of non-secret encryption (or public key as it would later be known)

Title : A note on 'Non-secret Encryption' Author : C.C. Cocks Date of publication : 20 November 1973 Address : http://www.cesg.gov.uj/publications/media/nsecret/notense.pdf Description : "A possible implementation of J H Ellis's proposed method of encryption involving no sharing of secret information. The first known, practical, implementation of Public key encryption in the world.

Title : The history of Non-Secret Encryption Author : J.H. Ellis Date of publication : 1987 Address : http://www.cesg.gov.uk/publications/media/nsecret/ellis.pdf Description : James Ellis's report on the early history of non-secret encryption written for historical accuracy, intended for after GCHQ had deemed no further benifit could be obtained from continued secrecy.

Title : GCHQ honors man who invented internet security Author : Government communications Head Quarters press officer - Bob McNally Address : http://www.gchq.gov.uk/press_office/ellis.html Date : 06/03/2003 Date of publication : 4th July 2002 Description : An article on James Ellis

Title : The open secret Author : Steven Levy Address : http://www.wired.com/wired/archive/7.04/crypto.html Date accessed : 06/03/2003 Date of publication : Apr 1999 Description : An account of James Ellis' discovery of public key encryption

Title : The Mathematical Guts of RSA Encryption Author : Francis Litterio Address : http://world.std.com/~franl/crypto/rsa-guts.html Date : 18/02/2003 Description : A description of the RSA encryption algorithm

Title : "A new kind of cipher that would take millions of years to break" Author : Martin Gardner Address : http://www.fortunecity.com/emachines/e11/86/cipher1.html Date : 04/03/2003 Description : The original paper article in Scientific American in which the RSA cipher was unveiled

Title : The code book Author : Simon Singh ISBN : 0 00763 574 5 Date first published : 1999 Date edition published : 2000 Description : A history of codes and code breaking from the first monoalphabetic ciphers to the future of quantum computing

Title : Structured Computer Organisation Author : Andrew S. Tanenbaum ISBN : 0 13 020435 8 Date first published : 1976 Date edition published : 1999 Description : A book on the internal workings of computers, with a description of the history of computer technologies.