A method and device for updating ibe keys based on utxo model

A key update and key technology, applied in the computer field, can solve problems such as user key update

Active Publication Date: 2020-06-30
STATE GRID E COMMERCE CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, how to update the user key in the IBE scheme becomes a problem

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  • A method and device for updating ibe keys based on utxo model
  • A method and device for updating ibe keys based on utxo model
  • A method and device for updating ibe keys based on utxo model

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0049] The embodiment of the present application discloses an IBE key update method based on the UTXO model, including: obtaining the latest updated UTXO transaction information for the target user from the blockchain when the key of the target user needs to be updated; If the target user is an unsupervised user, then obtain the identity information of the target user from the output information in the UTXO transaction information; change the master private key and master public key ...

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Abstract

This application provides an IBE key update method and device based on the UTXO model, including: when the target user's key needs to be updated, obtain the latest updated UTXO transaction information for the target user from the blockchain; The target user's identity information is obtained from the output information in the transaction information; if the target user is an unsupervised user, the target user's master private key and master public key are changed, and the target user's identity information and the changed or, if the target user is an unsupervised user, change the target user’s identity information, and use the target user’s master public key and the changed identity information to update The target user's private key. In this application, through the above methods, the update of the key of the target user can be realized.

Description

technical field [0001] The present application relates to the field of computer technology, in particular to an IBE key update method and device based on a UTXO model. Background technique [0002] At present, in the identity-based encryption (Identity Based Encryption, IBE) scheme, the KGC (KeyGeneration Center) generates the master public key and the master private key, and the KGC then uses the master public key, the master private key and the user's identity information (such as name, e-mail, ID number, etc.) to generate a private key for the user, and the user's identity information is the public key, without digital certificate binding, which can avoid the complex problem of digital certificate management in the PKI scheme. [0003] However, how to update the user key in the IBE scheme becomes a problem. Contents of the invention [0004] In order to solve the above technical problems, the embodiment of this application provides a UTXO model-based IBE key update met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/30H04L9/08H04L9/32
CPCH04L9/3006H04L9/0891H04L9/3247H04L9/3236H04L9/50
Inventor 孙涛王栋甄平玄佳兴廖会敏赵丽花王俊生
Owner STATE GRID E COMMERCE CO LTD
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