Research and implementation of security data management system based on cloud

Research and implementation of security data management system based on cloud

Zhang Meng 祎, Beijing posts and Telecommunications

In this paper, we propose an algorithm to generate ciphertext index code, which encodes protected plaintext data according to the underlying metadata set. At the same time, based on the structural characteristics of relational database, the paper designs a database ciphertext storage model for storing ciphertext data and cipher index code. According to the query problem of database ciphertext data in Das model, this paper presents a query algorithm of ciphertext data based on filtering query technique. In the process of data query, the algorithm first generates the corresponding cipher index code according to the user input plaintext query condition and transforms the plaintext query statement into cipher text filter, and the auxiliary database server completes the ciphertext query task. After the initial ciphertext filtration, The algorithm will decrypt the corresponding ciphertext data and make two queries according to the plaintext query, thus obtaining the accurate clear text data. Finally, based on the data storage model and attribute based access control strategy, this paper designs and implements a database management system based on DAS service model, verifies the feasibility and reliability of access control strategy, and measures the filtering rate of cipher text retrieval algorithm. The efficiency of storage and retrieval algorithm is proved by technical parameters such as detection rate and execution time.

Research and implementation of security data management system based on cloud