1
Bruno Brachtl, Christopher J Holloway, Richard E Lennon, Stephen M Matyas, Carl H Meyer, Jonathan Oseas: Transaction security system. International Business Machines Corporation, Edwin Lester, Frederick D Poag, John E Hoel, July 5, 1988: US04755940 (172 worldwide citation)

An electronic funds transfer system (EFT) is described in which retail terminals located in stores are connected through a public switched telecommunication system to card issuing agencies data processing centers. Users of the system are issued with intelligent secure bank cards, which include a mic ...


2
Richard E Lennon, Stephen M Matyas, Carl H W Meyer, Jonathan Oseas, Paul N Prentice, Walter L Tuchman: Cryptographic verification of operational keys used in communication networks. International Business Machines Corporation, Edwin Lester, March 11, 1980: US04193131 (124 worldwide citation)

In a data communication network providing communication security for communication sessions between a first station and a second station where each station has cryptographic apparatus provided with an operational key which should be common to both stations for cryptographic operations, an operationa ...


3
William F Ehrsam, Robert C Elander, Lloyd L Hollis, Richard E Lennon, Stephen M Matyas, Carl H W Meyer, Jonathan Oseas, Walter L Tuchman: Cryptographic communication security for multiple domain networks. International Business Machines Corporation, Edwin Lester, October 7, 1980: US04227253 (122 worldwide citation)

A communication security system for data transmissions between different domains of a multiple domain communication network where each domain includes a host system and its associated resources of programs and communication terminals. The host systems and communication terminals include data securit ...


4
Bruno Brachtl, Christopher J Holloway, Richard E Lennon, Stephen M Matyas, Carl H Meyer, Jonathan Oseas: Transaction security system using time variant parameter. International Business Machines Corporation, Edwin Lester, Frederick D Poag, John E Hoel, May 24, 1988: US04747050 (121 worldwide citation)

An electronic funds transfer system (EFT) is described in which retail terminals located in stores are connected through a public switched telecommunication system to card issuing agencies data processing centers. Users of the system are issued with intelligent secure bank cards, which include a mic ...


5
Robert C Elander, Richard E Lennon, Stephen M Matyas, Carl H W Meyer, Robert E Shuck, Walter L Tuchman: Cryptographic application for interbank verification. International Business Machines Corporation, Edwin Lester, February 19, 1985: US04500750 (65 worldwide citation)

In a data communication network which includes terminals interconnected via a central switch, a process for verifying the identity of a terminal user who is provided with secret data associated with his identity. In carrying out the verification process, the secret data is first encrypted at the ter ...