Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Key updating method and device, multi-attribute authority management system, equipment and medium

A key update and management system technology, which is applied in key update methods, equipment and media, multi-attribute authoritative management systems, and device fields, and can solve problems such as high computational overhead and poor security

Active Publication Date: 2021-10-08
BEIJING BYTEDANCE NETWORK TECH CO LTD
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]However, the existing key revocation technology has problems such as high computational cost and poor security
For example, the attribute authoritative server needs to calculate the corresponding key update message for each legal user, or needs to construct the key update message based on the private keys of all legal users, no matter which method is used, the required calculation overhead is related to the number of users , the calculation overhead is very high; in addition, there is also the possibility that other users or other attribute authorities may assist the revoked user to update the key, and the security is poor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Key updating method and device, multi-attribute authority management system, equipment and medium
  • Key updating method and device, multi-attribute authority management system, equipment and medium
  • Key updating method and device, multi-attribute authority management system, equipment and medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0023] In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure can also be implemented in other ways than described here; obviously, the embodiments in the description are only some of the embodiments of the present disclosure, and Not all examples.

[0024] The key revocation methods in the existing ABE (Attribute-Based Encryption, attribute-based encryption) algorithm are mainly divided into three categories. The third type is the key revocation method based on ciphertext-key update; among them, the key management revocation method based on...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The embodiment of the invention relates to a secret key updating method and device, a multi-attribute authority management system, equipment and a medium, wherein the method applied to a target attribute authority server comprises the steps of generating a new random secret key for a target attribute carried in an attribute authority revocation message when the attribute authority revocation message is received, and replacing the original random key of the target attribute; based on the new random key, the original random key and the identity information of the target user, obtaining current key update messages corresponding to attribute authority servers in the multi-attribute authority management system; and broadcasting the obtained current secret key updating message, wherein the current secret key updating message is used for indicating other user terminals in the multi-attribute authority management system to update the decryption private keys of the target attributes stored by the other user terminals respectively. According to the mode, the calculation overhead required by key revocation can be effectively reduced, and the security and reliability of key revocation can be fully guaranteed.

Description

technical field [0001] The present disclosure relates to the technical field of data processing, and in particular to a key update method, device, multi-attribute authoritative management system, equipment and media. Background technique [0002] In many practical scenarios, it is necessary to revoke the user's access to sensitive data, that is, the relevant key of the user needs to be revoked, so that the user has no right to decrypt the sensitive data. Key revocation technology is an important technical means to support flexible changes in permissions , which is essential to ensure data security. [0003] However, existing key revocation techniques have problems such as high computational overhead and poor security. For example, the attribute authoritative server needs to calculate the corresponding key update message for each legal user, or needs to construct the key update message based on the private keys of all legal users, no matter which method is used, the required...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/60G06F21/62G06F21/31G06F7/58
CPCG06F21/602G06F21/31G06F21/6245G06F7/58
Inventor 林宇贺培轩丁保增吴烨
Owner BEIJING BYTEDANCE NETWORK TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com