Title:
キー管理方法、クライアントおよびプログラム
Document Type and Number:
Japanese Patent JP7137707
Kind Code:
B2
Abstract:
Disclosed are a key management method and a related device. The method comprises: a client selects a random number and a key according to an operation instruction inputted by a user; generate a first encrypted ciphertext of the key according to the random number, the key, a first public key, and a second public key, wherein the first public key is determined according to a point on an elliptic curve and a private key of a hardware security module, and the second public key is determined according to the point on the elliptic curve and a private key of the client; generate a symmetric key sequence according to the key and a preselected Hash function, and according to the symmetric key sequence, encrypt cloud storage data to obtain a data ciphertext; and transmit the first encrypted ciphertext and the data ciphertext to a cloud server.
Inventors:
Kon, Chinley
Application Number:
JP2021532878A
Publication Date:
September 14, 2022
Filing Date:
May 19, 2020
Export Citation:
Assignee:
Tencent Technology (Shenzhen) Company Limited
International Classes:
H04L9/08; G06F21/60; H04L9/16
Domestic Patent References:
| JP2016522658A |
Foreign References:
| WO2015045512A1 | ||||
| US20180025167 |
Other References:
佐古 和恵 ほか,シャッフリングによる大規模電子投票システムの実現,情報処理,日本,社団法人情報処理学会,2001年09月15日,第42巻,第9号,pp.51-56
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Osamu Miyazaki
Tadahiko Ito
Osamu Miyazaki
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