The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 17, 2024
Filed:
Mar. 11, 2020
Shanghai Nanojclean Technology Co., Ltd., Shanghai, CN;
Jianliang Gu, Shanghai, CN;
Bangya Ma, Shanghai, CN;
Shanghai NanoJClean Technology, Co., Ltd., Shanghai, CN;
Abstract
Methods for splitting and recovering a key, a storage medium, a computer program product, and a key management system (), wherein the key management system () comprises a management device () used for managing user equipment of users in a user group and a hardware security module () connected to the management device (). The method for splitting a key comprises: at the hardware security module (): obtaining the number of the users in the user group and a first predetermined value (); randomly generating a transaction key associated with the processing authority of the current transaction on the basis of messages of other users except the splitting user in the user group (); splitting the transaction key into a plurality of sub-keys the same as the users in number, wherein each sub-key in the plurality of sub-keys corresponds to one user in the user group (); and encrypting the plurality of sub-keys by using public keys of the users corresponding to the plurality of sub-keys, respectively ().