Homomorphic data decryption method and apparatus for implementing privacy protection
地域：
George Town
摘要
A computer-implemented method, non-transitory, computer-readable medium, and computer-implemented system are provided for implementing privacy protection. In an implementation, a public key pk={N, h} corresponding to a target user is obtained, where h is a generator of a predetermined cyclic group with a size of k in a random number space Z*N, a length of k is i bits, a length of N is n bits, and i<
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Message space ZN can be obtained based on determined number N, and message space ZN includes elements {0, . . . , N?1}. Random number space Z*N can be determined based on message space ZN, and elements included in random number space Z*N are all elements that are in message space ZN and relatively prime to N. Because N=P·Q, it can be determined that the size (namely, the number of elements included) of random number space Z*N is (P?1)(Q?1).
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