Simplifying key management in electronic fund transfer point of sale systems
Henry J. Beker, J.M.K. Friend, Paul Halliden · Electronics Letters · 1983
In the letter we will consider some of the security problems that arise within a large electronic fund transfer point of sale (EFTPOS) system, paying particular attention to the difficulties of key management. In particular, we will introduce the concept of a transaction key which provides automatic key management at almost no extra cost.