Preventing replay attacks on digital information distributed by

Procedure and decoder for decrypting a coded video signal

Process and apparatus for authenticating the signature of a sign

Process and apparatus for the protection of secret elements in a

Process and circuit layout for the recognition of an identificat

Process and device for activating a chip card

Process for authentication, by an outside medium, of a portable

Process for cryptographic key generation and safekeeping

Process for detecting unauthorized introduction of any data tran

Process for encrypting a fingerprint onto an I.D. card

Process for exchange of rights between microprocessor cards

Process for improving public key authentication

Process for pledging data for a secure data exchange protocol

Process for protecting components of smart or chip cards from fr

Process for the acceptance of a virtual prepaid card use request

Process for the authentication of a data processing system by an

Process for the broadcasting and reception of access title contr

Process for the broadcasting of conditional access programs perm

Process for the broadcasting of programmes with progressive cond

Process for the control of secret keys between two smart cards