Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1986-04-21
1988-07-12
Cangialosi, Salvatore
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 21, 380 25, H04L 900
Patent
active
047575328
ABSTRACT:
An information transport system for conveying information between a franking meter machine and a post office equipment includes a unit having a non-volatile read/write memory which may consist of an EEPROM which can be transported between the meter and the equipment. When the unit is inserted in the franking machine a transaction code is verified by comparison with a registered code and information transfer is effected. The machine then generates a new code and stores it in a register. Upon return of the unit to the post office, the equipment responds to the transaction code stored in the unit to generate a new code corresponding to the new code generated and stored in the meter machine.
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"Cryptography and Data Security", by D. E. R. Denning, 1982.
Alcatel Business Systems Limited
Cangialosi Salvatore
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