Secure Commercial Digital Communications.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO
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This thesis examines the need for, applications of, and effects of a cryptographic system on digital communications systems. The discussion on the rational for encrypting data examines the threats to communications security and the role cryptographic systems have in countering the threats. This thesis does not address the legal requirements for security as the requirements are still in the developmental stages by both federal and state legislative bodies. The discussion of digital communications characteristics outlines the parameters which are of importance to the application of cryptography to digital communications. A review of the general methods and principles of cryptography provides an examination of past methods and reviews the weaknesses of the past systems. The application of cryptographic systems to voice communications is not addressed in this thesis. Many of the methods used to protect digital communications could be applied to voice communications. The voice data must be sampled, quantized, digitalized, and then encrypted at the transmission end of the voice circuit.
- Voice Communications