A Study of Ciphertext Fuzzy Retrieval Based on Information Matrix

To the ciphertext retrieval and the security of ciphertext database, we propose a ciphertext fuzzy retrieval method based on the information matrix in this paper. On the basis of the Bloom Filter, we introduce the index of the information matrix and the digital disturbance in the process of index generation, after which we performe the string conversion encryption. It not only supports the fuzzy search function of strings, but resists similarity attacks as well. With the DFR method during ciphertext retrieval, the first stage of filtering is completed by index matching, and then the exact retrieval is performed. Experiments and safety analysis show that the scheme has more advantages in efficiency and safety.