| 摘要 |
<p>A method and a device for protecting confidential data banks stored in smart cards (2) such as WORM cards. The data is first accessed by mutual recognition of a single encrypted code stored in the security chip (1) linked to the smart card as well as in the security chip of a card reader module (4). Whenever necessary, reinforced protection of the text on the card is achieved by means of an encryption circuit combining the methods of transposition and substitution with a secret key associated with the smart card. The method and device are useful in the field of health care.</p> |
