Exploration on the construction of colleges general education credit bank based on blockchain technology

Aiming at the current problems of cross-institutional mutual recognition, poor traceability and lack of trust in general education credit management, this study proposes a blockchain technology-based credit banking system construction scheme. The decentralised storage and sharing of credit data is achieved through the design of distributed ledger architecture, and smart contract technology is used to automate the execution of credit authentication, accumulation and conversion rules. Construct a standardised model of credit metadata, define the blockchain storage format of course code, credit hours, grades and other data fields, and apply the improved PBFT consensus mechanism to improve the transaction processing efficiency while ensuring data consistency. Zero-knowledge proof technology is used to realise privacy protection and ensure the security of students' sensitive information when it flows across institutions. Experimental results show that the system improves the efficiency of credit verification by 68% compared with the traditional centralised system.