On November 14, the Science and Technology Daily published the article "The blockchain is for information security, whether it is armor or weakness." The article mentioned that the anonymity feature is a double-edged sword. In the era when blockchain technology is about to be widely used, the security of cyberspace will have new features. The article also pointed out that the blockchain also faces many external security threats – mainly for the destruction, modification and disclosure of algorithms, protocols, implementations, applications and systems, etc., embodied in the integrity and non-repudiation of blockchain data. , anonymity, privacy protection, and more.