| 摘要 |
The securing method for preventing the decryption of decryptable encrypted data uses a key (privX) common to a number of users each possessing an identifiable control unit (3) containing a personalized proxy function (proxyXA) and a personalized key (privA), and comprises the steps of effecting, by using the personalized proxy function, a transcryption into a decryptable encryption by the personalized key (privA), and of simultaneously ensuring a decryption of the data by using the personalized key (privA). |
