Research on Smart Contract Application System Integrating Big Data Platform and Blockchain Technology in Universities

This paper discusses a smart contract application system that integrates the university big data platform and blockchain technology, aiming to realize the secure storage, transparent management and automatic processing of academic records. The core of the system is a combination of hash algorithm, Merkel tree, symmetric encryption technology and smart contracts to ensure data integrity, privacy protection and operation automation. First, each academic record is hashed using a hash algorithm (such as SHA-256) to generate a unique fingerprint, ensuring that any small changes in the data can be detected. Then, these hashes form a Merkle tree structure, which is embedded in the blockchain through the Merkle Root hash, so that users can verify the authenticity of the record without disclosing specific information, greatly improving the verification efficiency. Considering privacy protection, the system adopts the symmetric encryption algorithm AES-256 to encrypt the original academic records, and only the encrypted data and the Merkel-proof are linked, effectively balancing the needs of transparency and privacy.