Telegraphy – Systems – Printing
Patent
1984-02-21
1986-12-30
Cangialosi, Salvatore
Telegraphy
Systems
Printing
178 2216, 178 2209, H04L 900
Patent
active
046330372
ABSTRACT:
Commercial transactions conducted over a telecommunications link are verified using a transaction key available at both ends of the link. The transaction key is produced by combining (1) data supplied to the retailer by a customer and stored by the bank with (2) data stored by the retailer. The telecommunications link includes a node which passes the retailer's data to the bank in the form of a label obtained by encrypting the retailer's code with a client code. The bank retrieves the bank code and decrypts the label to obtain the retailer's code. The bank also retrieves the customer's data and combines the two elements to obtain the same transaction key that was created at the retailer's terminal.
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1978 National Telecommunications Conference, vol. 2, Dec. 1978, pp. 26.1.1.-26.1.6., New York U.S. R. E. Lennon, et al: "Cryptographic Key Distribution Using Composite Keys" p. 26.1.2. left-hand column, lines 11-34.
British Telecommunications public limited company
Cangialosi Salvatore
Lewis Aaron J.
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