International Business Machines Corporation

Lenovo (singapore) Pte. Ltd.

Lenovo Limited

Compagnie Ibm France

Pascal Roy

Jean-Francois Le Pennec

Jacques Fieschi

Patrick Michel

Alain Benayoun

Jean-François Le Pennec

A method for validating an electronic payment by a credit/debit card in a transaction system. The method includes registering a purchase of an article by a buyer using a credit/debit card associated with at least one PIN code, checking that the at least one PIN code is associated with the number of said credit/debit card provided by said buyer to said seller terminal, checking, by said electronic payment center, whether or not said at least one PIN code is valid, and one of: after the at least one PIN code is found to be valid, checking, by said electronic payment center, whether the electronic payment center has received a pre-validation from a third party; after the at least one PIN code is found to be valid, contacting a third party via a communication network and requesting that the third party validate the purchase; and after the at least one PIN code is found to be valid, contacting a third party via a communication network and requesting said at least one PIN code from the third party. The third party is a prime owner of the credit/debit card.

Method for validating an electronic payment by a credit/debit card

A security system for preventing unauthorized use of a computer device. An extractable security piece includes an extractable main private key and a main PC public key. A PC security area which is a non-extractable part of the computer device includes a PC private key and an extractable main public key, which, together with the keys of the extractable security piece, constitute a Public Key Infrastructure. The extractable security piece and the PC security area include processing means for mutual authentication of the extractable security piece and the PC security area after the extractable security piece, which had been previously removed, has been reinserted in the computer device, thereby enabling the authorized user to access data stored in the computer device.

Security system for preventing a personal computer from being used by an unauthorized people

Method for validating an electronic payment by a credit card in a transaction system comprising a seller terminal () for registering a sale of one or several articles by a buyer (or) using a credit card associated with a plurality of PIN codes and an electronic payment center () connected to the seller terminal by the Internet network (). The method consists for the electronic payment center to check that a buyer PIN code which is provided by the buyer to the center is associated with the number of the credit card provided by the buyer to the seller terminal and is characterized in that it comprises a step automatically carried out by the electronic payment center of checking with a third party whether the buyer PIN code is valid.

Growing community of inventors

Biot, France

Pascal Roy