Block chain security defense method and system based on post quantum cryptography

The invention discloses a block chain security defense method and system based on post quantum cryptography. According to the block chain security defense system based on the post quantum cryptography, four post quantum cryptography algorithms are integrated for a block chain scene, and the block chain security defense system based on the post quantum cryptography is designed and comprises a request processing module and a data processing module. And the data processing module comprises an encryption and decryption sub-module, a signature and verification sub-module, a key de-encapsulation sub-module and a key generation sub-module. The system provided by the invention can provide encryption and decryption, signature and verification functions against quantum attacks for the block chain, and is helpful for improving the security of the existing block chain system. The block chain security defense system based on the post quantum cryptography has good compatibility and can support various existing mainstream b