KEY UPDATING METHOD AND APPARATUS, FILE SHARING METHOD AND APPARATUS, DEVICE, AND COMPUTER STORAGE MEDIUM

WIPO Patent Application WO/2023/010727

A1

The present application discloses a key updating method and apparatus, a file sharing method and apparatus, a device, and a computer storage medium. The key updating method comprises: obtaining a target root key and an auxiliary target root key; obtaining the identity information of a data owner of target data; obtaining a target timestamp when the target data is encrypted; obtaining a key generation parameter and an auxiliary key that are generated at a previous timestamp of the target timestamp; and generating a target private key of the data owner on the basis of the key generation parameter and auxiliary key of the previous timestamp of the target timestamp, the identity information, and the target timestamp, wherein the key generation parameter generated at the previous timestamp of a starting timestamp is the target root key, and the auxiliary key generated at the previous timestamp of the starting timestamp is the auxiliary target root key. According to the present application, the identity information and the target timestamp are introduced in the process of generating the target private key, and the identity information and the target timestamp are variable information, so that the target private key is difficult to crack, and thus, the generation security of the target private key is improved.

MA FUQIANG (CN)
XU ZHENG (CN)
GAO GUOLU (CN)

PCT/CN2021/134052

February 09, 2023

November 29, 2021

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INSPUR SUZHOU INTELLIGENT TECHNOLOGY CO LTD (CN)

H04L9/08

CN113346998A	2021-09-03
CN110719295A	2020-01-21
CN110958219A	2020-04-03
US20130124870A1	2013-05-16
US20170374070A1	2017-12-28

SUNSHINE INTELLECTUAL PROPERTY INTERNATIONAL CO., LTD. (CN)

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