Patents Assigned to De La Rue Cartes Et Systems SAS
  • Device for implementing a message signature system and chip card comprising such a device
    Patent number: 5748782
    Abstract: This provides a first device for implementing an RSA-type protected data exchange system for the signing of messages and the verification of the signed messages, and a second device for inhibiting the encryption anti decryption functions inherent of such systems so as to authorize only the signature and signature functions and public key authentication.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: May 5, 1998
    Assignee: De La Rue Cartes Et Systems SAS
    Inventors: Ronald Ferreira, Joseph Hoppe