04910774 is referenced by 166 patents and cites 23 patents.

The method in suitable for authenticating electronic memory cards intended for authorizing the supply of goods or services after being processed by a card reader machine. The card memory includes at least three zones (Z.sub.1, Z.sub.2, Z.sub.3) comprising a first zone (Z.sub.1) which is readable from outside and which contains information (I) and a corresponding signature (S) obtained by means of secret data (D) recorded in the third zone (A.sub.3) which cannot be read from outside the card. The second zone (Z.sub.2) which can be read from outside the card contains the result of secret key and public key encoding all of the data contained in the first zone. This method provides effective protection against several types of fraud.

Title
Method and system for suthenticating electronic memory cards
Application Number
7/216644
Publication Number
4910774
Application Date
July 8, 1988
Publication Date
March 20, 1990
Inventor
Simon Barakat
Andresy
FR
Agent
Sanford J Asman
Assignee
Schlumberger
FR
IPC
H04K 1/00
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