Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1987-02-05
1989-04-18
Cangialosi, Salvatore
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 24, 380 25, 380 29, H04L 900
Patent
active
048233889
ABSTRACT:
A communications network system is constructed by connecting a plurality of customer terminals to one central terminal via communication lines. Enciphering devices and a deciphering device, such as IC (integrated circuit) cards, are provided for the terminals. In order to achieve a digital signature for a transaction message sent from a customer to the center, the message is enciphered according to a prescribed enciphering algorithm using a key word that can specify the sender and the transaction. At the central terminal the enciphered message is deciphered according to a prescribed deciphering algorithm that is different from the enciphering algorithm using a key word which can specify the sender and the transaction. The key data and encipering and deciphering algorithms are sealed in the enciphering and deciphering devices such that they cannot be accessed from the outside.
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Kamitake Takashi
Mizutani Hiroyuki
Cangialosi Salvatore
Kabushiki Kaisha Toshiba
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