Telegraphy – Systems – Printing
Patent
1983-12-07
1986-03-25
Cangialosi, Salvatore
Telegraphy
Systems
Printing
178 2208, 34082534, H04L 900
Patent
active
045785309
ABSTRACT:
An efficient end-to-end encryption system including key management procedures for providing secure, financial data communication between a system user at one of a plurality of transaction terminals of one of a plurality of acquirer institutions and one of a plurality of issuer institutions, with selected elements of the data being encrypted, decrypted, and processed using a onetime session key which is similarly encrypted with master keys and efficiently sent along with the specific segments of the request and response messages. A session key authentication code is utilized to prevent the replay of a previously used session key, thereby precluding undetected message replay or undetected message or data element substitution or insertion.
REFERENCES:
patent: 4075460 (1978-02-01), Gorgens
patent: 4193131 (1980-03-01), Lennon et al.
patent: 4259720 (1981-03-01), Campbell
patent: 4268715 (1981-05-01), Atalla
patent: 4423287 (1983-12-01), Zeidler
Cangialosi Salvatore
Lewis Aaron J.
VISA U.S.A. Inc.
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