A block chain digital signature method, device and system based on quantum cryptography

Abstract

The invention discloses a block chain digital signature method, device and system based on quantum cryptography, which is applied to the entrusting party in the block chain, and the entrusting party is generated based on an election mechanism. The method includes: the receiver and the entrusting party receive Quantum signature and signature information; if the recipient passes the quantum signature verification, receive the quantum entrustment sent by the recipient; the entrusting party verifies the signature information based on the quantum entrustment; if the verification is passed, receive the private key pair sent by the recipient , verify the quantum signature based on the private key pair. In the above process, the quantum signature, quantum entrustment and private key pair are constructed based on the quantum key technology, and the entrusting party is selected based on the election mechanism, and the entrusting party uses the quantum key technology to verify the quantum signature. The party can fully guarantee its impartiality in message verification. Due to the high security of the quantum key, the security can be guaranteed without complex keys, and the efficiency of the signature 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

Images