Protection system for intelligent cards

Details Protection system for intelligent cards Protection system for intelligent cards

1981-10-19

1984-06-05

Pitts, Harold I.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235381, 235382, G06K 500

Patent

active

044530749

ABSTRACT:
There is disclosed a protection system for intelligent cards. Each card has stored in it a code which is the encryption of a concatenation of a user secret password and a common reference text. The encryption is derived by an initialization terminal which uses the private key associated with the public key of a public-key cryptosystem key pair. Each transaction terminal with which a card is used decrypts the stored code in accordance with the public key. A transaction is effected only if the stored code decrypts into the user password which is inputted on a keyboard and the common reference text.

REFERENCES:
patent: 4288659 (1981-09-01), Atalla

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