Babbitt News, on December 7, at the "Blockchain Technology and Application" Science and Technology Frontier Forum sponsored by the Chinese Academy of Sciences, Wang Xiaoyun, an academician of the Chinese Academy of Sciences and a member of the International Cryptographic Association, was entitled When he talked about the specific relationship between cryptography and hash function in the speech "Blockchain technology", Wang Xiaoyun explained, "The hash function is the origin technology of the blockchain, and the signature technology under the hash function is the blockchain technology." Blockchain is a specialized term in hash functions, an old concept. "The reason for vigorously developing hash functions is on the one hand high efficiency and on the other hand hash functions can resist all attacks based on data tampering. From the 1979 cryptographer Ralph Merkle proposed the Merkle-Damgard structure, and in 2009 Satoshi Nakamoto proposed the Bitcoin. After 30 years of development, the blockchain has gradually matured from the earliest cryptographic structure and has gradually expanded from the financial field to the supply chain. Finance, supply chain traceability, and other fields have resolved pain points in multiple industries, providing new impetus for China to accelerate inclusive finance and strengthen the traceability of supply chain security.