Blockchain key management method, multi-person common signature method and electronic device

A blockchain and key storage technology, applied in the field of information security technology and data encryption management, can solve the problem of low security, achieve excellent space overhead, reduce storage pressure, and improve security.

Pending Publication Date: 2020-09-08
INST OF INFORMATION ENG CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these schemes, the secret to be calculated is simply split (for example, the secret Q is split into a, b, c, and Q=a+b+c), so the security in the scheme is not high, so it is necessary to Further research on the application of secure multi-party computing in blockchain key management

Method used

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  • Blockchain key management method, multi-person common signature method and electronic device
  • Blockchain key management method, multi-person common signature method and electronic device
  • Blockchain key management method, multi-person common signature method and electronic device

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Embodiment Construction

[0075] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail through the following examples.

[0076] The invention discloses a block chain key management method that integrates feature encryption and multi-party security calculation. The method is composed of two parts on the chain and off the chain. Distributed ledger), transactions and smart contracts, mainly to complete the execution of contracts and currency settlement; complete operations such as key generation, data encryption and decryption under the chain; collaborative storage of user keys and files on and off the chain; Retrieval and storage of user keys and files on the Internet; storage and recovery of user private keys; for multi-party signature scenarios in the blockchain, use multi-party secure computing to complete collaborative private key storage and signature (decryption); user files and encryption key v...

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Abstract

The invention provides a blockchain key management method, a multi-person common signature method and an electronic device, the blockchain key management method is composed of an on-chain part and anoff-chain part, the on-chain part completes contract execution and currency settlement, and the off-chain part completes key generation, data encryption and decryption operations; and the method comprises the steps of performing on-chain and off-chain collaborative storage on the user key and the file; retrieving and storing a user key and a file on the chain; storing and recovering the user private key; for a multi-party signature scene in the blockchain, completing collaborative private key storage and signature by utilizing multi-party security calculation; verifying the file and the secretkey of the user; and revoking and updating the key of the user. According to the method, the security of the blockchain key is remarkably improved, the time overhead is very low, the space overhead is very excellent, and thus better services can be provided for users.

Description

technical field [0001] The present invention relates to the technical field of information security technology and data encryption management method, in particular to a block chain key management method, a multi-person co-signing method and an electronic device. Background technique [0002] Blockchain was originally referenced in Bitcoin, which is the core supporting technology of Bitcoin, which is characterized by decentralization, non-repudiation and traceability. This ensures that currencies such as Bitcoin can transfer value across untrusted networks. At the same time, by designing various smart contracts based on the blockchain, people can make the blockchain applicable to various fields such as medical care and financial technology. As the number of application scenarios increases, blockchain as a developed technology involves the operation of multiple transactions. This makes the application structure of blockchain complex and large in scale. Not only that, but th...

Claims

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Application Information

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IPC IPC(8): G06F21/62G06F21/60G06F21/31
CPCG06F21/6218G06F21/602G06F21/31
Inventor 李兆轩章睿孙优苏倩倩
Owner INST OF INFORMATION ENG CAS
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