Efficient database encryption method based on dictionary mapping

The invention discloses an efficient database encryption method based on dictionary mapping. The method comprises at least a dictionary generation process, a dictionary encryption and storage process,a dictionary calling and decryption process, a ciphertext data generation and storage process, a ciphertext search process, a dictionary update process, and a double-dictionary running process. The efficient database encryption method based on dictionary mapping effectively prevents data information from disclosing after a database is invaded, and makes data break and breach much harder at the cost of small system performance. 本发明公开了种基于字典映射的高效数据库加密方法,至少包含字典生成流程、字典加密并存储流程、字典调用并解密流程、密文数据生成并存储流程、密文检索流程、字典更新流程、双字典运行流程。本发明的基于字典映射的高效数据库加密方法，可以有效防止数据库被入侵后数据信息泄露，实现以牺牲较小的系统性能为代价极大的增加了数据被破解泄露的难度。