Based on the character of cloud storage string encryption and cipher text retrieval of string research

摘要

In this paper, we build a set of high-performance sequence retrieve system of string encryption and data cipher text, which aimed to the safe problems of string storage and cipher text retrieval performance issues after encryption in Cloud Storage business. First, In encryption, we put forward a kind of encryption strategy based on IDEA. Second, as for cipher text retrieval, we put forward a modified bucket partitioning strategy, Finally, we look forward a modified character set index generation strategy based on BloomFilter which combined with the generation strategy of relationship between positions of characters feature index based on pairs coding function map. Through experiments, this kind of dual retrieval strategy has improvement in performance than former retrieval strategies.