Hash algorithm, also known as "hash", is one of the four core technologies of blockchain. It is an algorithm that can calculate a fixed-length string (also called message digest) corresponding to a digital message.

Hash algorithm is a one-way encryption mechanism to ensure that transaction information is not tampered with in the blockchain. Blockchain encrypts the transactions in the transaction block through hash algorithm, and compresses the information into a hash string consisting of a series of numbers and letters.

The hash value of blockchain can uniquely and accurately identify a block. When verifying the authenticity of a block, it is only necessary to simply calculate the hash value of this block. If there is no change, it means that the information on this block has not been tampered with.

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Xueshuo Innovation Blockchain Technology Workstation under Lianqiao Education Online is the only approved "Blockchain Technology Specialty" pilot workstation of "Smart Learning Workshop 2020- Xueshuo Innovation Workstation" carried out by School Planning and Construction Development Center of China Ministry of Education. On the basis of providing students with diversified growth paths, the professional station will promote the reform of Industry-University-Research training mode for professional degree graduates and build an applied and compound talent training system.