Research on Multi-Level Encryption Strategies for Data Sharing Security Protection in Universities

Data sharing in colleges and universities faces severe security risks such as data leakage, theft and tampering. In order to enhance the security protection ability of the data sharing process, this study proposes a multi-level encryption strategy for the whole process of data sharing, which covers the key aspects of automatic identification of sensitive data, data storage and sharing and transmission. The scheme first utilizes the hierarchical analysis method to evaluate the sensitivity of fields and realize the automatic identification of sensitive fields. Subsequently, sensitive fields are encrypted based on elliptic curve asymmetric encryption algorithm to realize fine-grained encryption protection and effectively prevent data leakage and tampering. In the data transmission phase, digital certificate encryption technology is used to realize the authentication and encryption of data symmetric encryption key through the key negotiation mechanism to ensure the authenticity and integrity of data transmission and prevent data theft and forgery. Experimental analysis shows that the scheme demonstrates high security, stability and good performance in both the data storage and transmission phases, effectively improving the protection of sensitive data fields as well as data integrity and authenticity verification. The research results are of great significance in guiding the data security and privacy protection in the process of data sharing in universities and the improvement of the security protection capability of university data center.