| 摘要 |
The invention concerns a method for making secure the execution of a session with processing means, such as a smart card (CA), under the control of at least two entities, such as servers (EX, EY), which consists in: transmitting (X2, Y2) session numbers (NSX, NSY) and session keys (KSX, KSY) to the entities; applying (X6, X; Y6, Y8) the session number and key to an algorithm (ASX, ASY) in the processing means and the respective entity to produce a result (REX, REY) and signature (SGY, SGY); transmitting (X7, Y7) the numbers and the signatures to the processing means; and executing (F10) the session corresponding to the numbers from the processing means when the signatures are identical (X9, Y9) to the results. In another embodiment, one of the entities receives a delegation of a third entity to authorise execution of the session.
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