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Homomorphic data decryption method and apparatus for implementing privacy protection

專利號(hào)
US11159305B2
公開(kāi)日期
2021-10-26
申請(qǐng)人
Advanced New Technologies Co., Ltd.（KY Grand Cayman）
發(fā)明人
Shuai Han; Zhangjie Huang; Huanyu Ma; Hao Lei
IPC分類
H04L29/06; H04L9/00; H04L9/30; H04L9/06
技術(shù)領(lǐng)域
ciphertext,mod,hn,blockchain,n2,qrn,user,group,encryption,key
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

Actually, random number space Z*N further includes other subgroups. For example, FIG. 3 is a schematic diagram illustrating random number space Z*N, according to an example implementation. As shown in FIG. 3, in addition to the previous subgroups, random number space Z*N can include other subgroups such as group Z*N[+1] and group custom characterwcustom character. However, encryption efficiency can be low when a predetermined cyclic group is formed based on these subgroups. Group Z*N[+1] represents a set formed by all elements whose Jacobi symbols are +1 in random number space Z*N, in other words, Z*N[+1]={y|y∈Z*N,

( y N ) = + 1 } .

權(quán)利要求

1
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