Data carrier-controlled terminal in a data exchange system

Details Data carrier-controlled terminal in a data exchange system Data carrier-controlled terminal in a data exchange system

1989-07-18

1992-03-03

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 4, 380 21, 380 23, 380 50, 235380, 235382, 34082531, 34082534, H04L 932, G07F 708

Patent

active

050938622

ABSTRACT:
A terminal (10) in a data exchange system with exchangeable portable user data carriers (4) has for their connection at least one connecting unit (3) and has further at least one data input unit (5). Exchangeable control modules (8, 9) are connected through one or more other, preferably similar, connecting units (6, 7). The modules are equipped with microprocessors and contain mechanically and cryptographically protected memory areas which receive secret data and keys for the secure carrying out of identity and authenticity tests, as well as application specific operational programs. These construction methods offer high security against unauthorized data access as well as against fraudulent manipulation of the device. They also greatly simplify the application independent design and construction of the terminal.

REFERENCES:
patent: 3925710 (1975-12-01), Ebert
patent: 4450535 (1984-05-01), DePommery et al.
patent: 4544833 (1985-10-01), Ugon
patent: 4656474 (1987-04-01), Mollier et al.
patent: 4672182 (1987-06-01), Hirokawa
patent: 4683550 (1987-07-01), Jindrick et al.
patent: 4683553 (1987-07-01), Mollier
patent: 4786790 (1988-11-01), Kruse et al.
patent: 4816654 (1989-03-01), Anderl et al.

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