SYSTEM ZUR ECHTHEITSPRÜFUNG EINES DATENTRÄGERS

摘要

PCT No. PCT/EP93/03668 Sec. 371 Date Sep. 20, 1995 Sec. 102(e) Date Sep. 20, 1995 PCT Filed Dec. 22, 1993 PCT Pub. No. WO94/15318 PCT Pub. Date Jul. 7, 1994A system for testing the authenticity of a data carrier determines the physical property of the data carrier from an irreversibly adjustable electric state of a circuit present separately on the integrated circuit, and uses the electric property of the circuit for establishing a characteristic value for the data carrier.