Patent ID: 8873754
Filing Date: 2014-10-28
Classification: H04L

Abstract:
1. A proxy-based encryption method, comprising: generating, according to a private key of a sending end and a public key of a receiving end, at least two proxy keys that correspond to at least two proxy servers, respectively, wherein a number of the proxy keys is equal to a number of the proxy servers; and sending encrypted ciphertexts and the at least two proxy keys that correspond to the at least two proxy servers, respectively, to the at least two proxy servers, respectively, so that the at least two proxy servers re-encrypt the encrypted ciphertexts according to the corresponding proxy keys, respectively; wherein the step of generating at least two proxy keys that correspond to at least two proxy servers respectively comprises: generating a random polynomial f(x)=c generating, according to the random polynomial and the public key of the receiving end, the proxy keys that corresponds to the at least two proxy servers, respectively.