METHOD AND SYSTEM FOR ENSURING THE INTEGRITY OF DISTRIBUTED CONFIDENTIAL DATA

摘要

The invention relates to a method for ensuring data integrity, characterized in that it comprises at least the following steps: To transmit a message xi, the sender A adds to the message xi containing the data to be transmitted a tagi label defined by tagi = h (xi), using a function h known only to sender A and receiver B, intended to guarantee the authentication and integrity check of the data transmitted (201), The message xi * composed of the message of the payload xi and tagi tag is encoded to produce a message C (xi *) which is transmitted to receiver B, the encoding is done in such a way as to ensure confidentiality using a secret encoding (202) , After transmission, the receiver B receives the message Xi * to which it applies a secret decoding to find a data message Xi and a tagi tag, then it checks the authentication and the integrity of the useful message received Xi by verifying that the relation Tagi = hk0 (Xi) is well respected side, guaranteeing Xi - xi.