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<
說明書
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Random number space Z*N includes the following subgroups: quadratic residue group QRN and group ?1
. Elements included in quadratic residue group QRN are elements that are in random number space Z*N and raised to the power of 2, in other words, QRN={y2 mod N|y∈Z*N}, and a size of quadratic residue group QRN is (P?1)(Q?1)/4. Group
?1
is a second-order cyclic group generated by element (?1 mod N), group
?1
includes elements {?1 mod N, 1 mod N}, in other words, a size of group
?1
is 2.
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