Jean Mollier

System for keeping account of predetermined homogeneous units

Method and device for protecting software delivered to a user by a supplier

Method for certifying the origin of at least one item of information stored in the memory of a first electronic device and transmitted to a second electronic device, and system for carrying out the method

Process and apparatus for authenticating the signature of a signed message

Process and system for transmission of signed messages

Apparatus for and method of recycling recording carriers, such as credit cards, including non-volatile erasable memories for identification data

Method to establish the origin of at least one bit of information stored in a memory of a first electronical device and transmitted to a second electronical device

Method and apparatus for authenticating the signature of a message

Method of and apparatus for inscribing a control character in a memory

Process for prolonging the validity of the memory working zone of a data carrier