CiteSeer.IST HomeCheck: The following citations are predicted to all refer to the same paper. Details
J H Ellis, The Possibility of Secure Non-Secret Digital Encryption, CESG Report, January 1970.
J.H. Ellis. The Possibility of Secure NonSecret Digital Encryption. CommunicationsElectronics Security Group, GCHQ, Cheltenham, Gloucestershire, U.K., January 1970.