Abstract: Information privacy of database is vulnerable to illegal attacks. It has low security and less storage space. In order to solve the problems an encryption storage algorithm database information privacy for based on chaotic mapping is proposed. The chaotic sequence is generated by disturbing the control parameters of Logistic chaotic mapping, and the sequence is mixed with the chaotic sequence generated by other systems to generate a new chaotic sequence. Then, the non-linear transformation is carried out through the dynamic coding algorithm. The output sequence is used as the database plaintext key to encrypt the plaintext. The index field for database encryption information query is constructed, compressed by hash function, and stored in the database together with the encrypted information realizing the information privacy encrypted storage of searchable chaotic mapping database. The experimental results show that the proposed method can shorten the time of encryption and decryption, reduce the space occupation and reduce the energy consumption.

Key words: chaotic map; , database; , encrypted storage; , chaotic sequence disturbance; , hash function