User private key management method and device based on blockchain, and medium

Abstract

The invention discloses a user private key management method and device based on a block chain and a medium. The method comprises steps of receiving a request of a user for storing a private key, andenabling the private key to be generated together with a public key when the user registers an account in the block chain; generating a secret key through an intelligent contract of the blockchain according to the request of the user for storing the private key, and encrypting the private key of the user by using the secret key; and respectively storing the encrypted private key and the secret keyin the block chain. According to the method, the block chain network based on the super account book is established, and the key is managed based on the characteristics of the private data of the super account book, so security and confidentiality of key storage are greatly improved. According to the method, the key retrieval is verified through the related algorithm of the aggregate signature, so communication cost is reduced, communication efficiency is improved, the characteristics of the aggregate signature are fully utilized, the key retrieval is realized through a multi-node voting mode, and centralized decision is avoided.

Description

technical field [0001] The present application relates to the technical field of block chain, and in particular to a block chain-based user private key management method, device and medium. Background technique [0002] At present, in most blockchains, the management of users' private keys is completely delegated to ordinary users. Although this method seems to achieve decentralization, there is no corresponding user-guided product design, which not only blocks some novice users from Outside the door, some users were also made to bear the loss of digital assets such as improper private key generation and loss of private key custody. [0003] Therefore, how to balance the gap between "decentralization" and "private key management" has become an urgent problem in this field. Contents of the invention [0004] The embodiment of this specification provides a blockchain-based user private key management method, device and medium, which are used to solve the following technical...

AI Technical Summary

Problems solved by technology

[0002] At present, in most blockchains, the management of users' private keys is completely delegated to ordinary users. Although this method seems to achieve decentralization, there is no corresponding user-guided product design, which not only blocks some novice users from Outside the door, some users were also made to bear the loss of digital assets such as improper private key generation and loss of private key custody.

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