发明名称 |
RECOVERY OF OBSOLETE DECRYPTION KEYS |
摘要 |
At least one expired decryption key intended to be used for asymmetrical decryption of encrypted data is recovered in a terminal after generation of a cryptographic encryption key/decryption key pair stored in a cryptographic medium such as a microchip card. The expired decryption key is stored in a database accessible to a user of the terminal and encrypted beforehand as a function of the new generated encryption key. In the terminal connected to the cryptographic medium, the encrypted expired encryption key is decrypted as a function of the decryption key stored in the cryptographic medium so that the encrypted data is decrypted as a function of the thus decrypted expired decryption key. |
申请公布号 |
EP1958371(A2) |
申请公布日期 |
2008.08.20 |
申请号 |
EP20060842095 |
申请日期 |
2006.12.05 |
申请人 |
FRANCE TELECOM |
发明人 |
LOC'H, JULIE;ARDITTI, DAVID;CAMUS,SYLVIE |
分类号 |
H04L9/08 |
主分类号 |
H04L9/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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