Protection system for intelligent cards

Details Protection system for intelligent cards Protection system for intelligent cards

H - Electricity

04

K

352/51, 340/70

H04K 1/00 (2006.01) G06F 21/00 (2006.01) G07F 7/10 (2006.01) H04L 29/06 (2006.01)

Patent

CA 1210470

-30- PROTECTION SYSTEM FOR INTELLIGENT CARDS Abstract There is disclosed a protection system for in- telligent 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 pri- vate 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 accord- ance 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.

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