METHOD FOR VERIFYING THE AUTHENTICITY OF A DATA MEDIUM

摘要

The invention concerns a method for verifying the authenticity of a data medium (1), in particular a chip card. The method is characterised in that the coded from of a physical characteristic (X) of the data medium (1) is stored in said medium. The coded form of said characteristic is transmitted to a terminal (3) which itself measures the physical characteristic (X). The latter (X) is coded with a secret code (Ks,s) and decoded with a known code (Ks,p) in the terminal (3). The authenticity is acknowledged when a coincidence is established after comparing the decoded characteristic with the measured characteristic, Said method ensures great security since the secret code (Ks,s) is contained neither in the medium (1) nor in the terminal (3).