Blockchain digital signature method, device and system based on quantum cryptography

Abstract

The invention discloses a blockchain digital signature method, device and system based on quantum cryptography, applied to a consignor in a blockchain, the consignor being generated based on an election mechanism. The method comprises the following steps: a receiver and the consignor receive a quantum signature and signature information sent by a sender; under the condition that the quantum signature passes the verification by the receiver, a quantum commission sent by the receiver is received; the consignor verifies the signature information based on quantum commission; and under the condition that the verification is passed, a private key pair sent by the receiver is received, and the quantum signature is verified based on the private key pair. In the above process, the quantum signature, the quantum commission and the private key pair are constructed based on the quantum key technology, the consignor is selected based on the election mechanism, the quantum signature is verified by the consignor by using the quantum key technology, and the consignor determined based on the election mechanism can fully ensure the fairness of the consignor in message verification. As the security of the quantum key is high, the security can be ensured without a complex key, and the signature efficiency is improved.

Description

technical field [0001] The present invention relates to the technical field of quantum communication, in particular to a quantum cryptography-based block chain digital signature method, device and system. Background technique [0002] The core of the blockchain is a chained distributed database secured by cryptography. In other words, cryptography is the most fundamental guarantee of blockchain security. Blockchain encryption usually uses a combination of asymmetric cryptography and symmetric cryptography to ensure the security and credibility of the blockchain network signature process. [0003] The current signature process mainly includes four types of lattice-based, encoding-based McEliece cipher, hash-based and multivariate-based digital signature schemes. The complexity of the key for class signature, the key may occupy several kilobytes, so that the signature process requires a large amount of ciphertext overhead, occupies a large memory, and affects the signature ef...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a block chain digital signature method, device and system based on quantum cryptography. There are four types of digital signature schemes. The above-mentioned signature process has low security. In order to improve security, the complexity of the key used to generate and verify this type of signature will be increased. The key may occupy several kilobytes, making the signature process Need to occupy a lot of ciphertext overhead, occupy a lot of memory, and affect the efficiency of signing

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