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<
說(shuō)明書
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As described above, generator h of selected predetermined cyclic group QRNβ??1
can be represented as h=?y2β mod N, where y∈Z*N. The size of predetermined cyclic group QRNβ?
?1
is 2α, and therefore the elements included in predetermined cyclic group QRNβ?
?1
are {h0, h1, h2, . . . , h2α?1}. In a subsequent encryption process, random number r needs to be selected, so that hr belongs to predetermined cyclic group QRNβ?
?1
. Therefore, a value of random number r belongs to [0, 2α?1], in other words, a length of random number r is related to a length of α.
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