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Homomorphic data decryption method and apparatus for implementing privacy protection

專(zhuān)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(lèi)
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(shū)

Optionally, the apparatus further includes the following: a transaction creation unit 76, configured to create a blockchain transaction between the target user and transaction objects Q_0 to Q_t based on transfer amounts m0 to mt respectively corresponding to transaction objects Q_0 to Q_t, where the blockchain transaction includes homomorphic ciphertext c0 to ct respectively corresponding to transfer amounts m0 to mt, t≥0, and account balances of the target user and transaction objects Q_0 to Q_t are respectively recorded as corresponding homomorphic ciphertext d and d_0 to d_t in a blockchain ledger; and a transaction submission unit 77, configured to submit the blockchain transaction to a blockchain network, where after the blockchain transaction is completed, for homomorphic ciphertext d, d_0, . . . , and d_t recorded in the blockchain ledger, there is an operation between d and (c0+ . . . +ct), an operation between d_0 and c0, . . . , and an operation between d_t and ct, so that the account balance of the target user is decreased by (m0+ . . . +mt), and the account balances of transaction objects Q_0 to Q_t are respectively decreased by c0 to ct.

權(quán)利要求

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