Data processing terminal device which stores a modified decrypte

Details Data processing terminal device which stores a modified decrypte Data processing terminal device which stores a modified decrypte

1986-09-02

1988-09-13

Shaw, Gareth D.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 23, 364900, 235380, H04M 318, G06F 500, G06K 500

Patent

active

047714603

ABSTRACT:
A data processing terminal device is on-line connected to a host computer and records on journal paper journal data obtained as a result of communication with the host computer. Data is encrypted, and encrypted data is exchanged between the terminal device and the host computer. The encrypted journal data received by the terminal is decrypted and printed on a journal paper, then modified and stored in a PROM. By comparing the journal data with the modified data, journal data alteration can be easily detected.

REFERENCES:
patent: 4100374 (1978-07-01), Jayant et al.
patent: 4277837 (1981-07-01), Stuckert
patent: 4355369 (1982-10-01), Garvin
patent: 4520232 (1985-05-01), Wilson

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