The ciphertext retrieval techniques are designed to provide query services over encrypted data and to improve the availability of encrypted data.However,most of existing methods leak additional information besides the query result,which may be utilized by the attacker to recover plaintext data or queries.How to enhance the privacy-preserving features in ciphertext retrieval and achieve the minimisation of information leakage has received a lot of attention from researchers.In recent years,with the rapid development of hardware chip technology and new cryptographic technology,a number of novel methods were proposed for privacy-preserving ciphertext retrieval.This paper mainly focuses on the research hotspots of diversified ciphertext retrieval,ciphertext retrieval based on trusted execution environment and private information retrieval,and summarizes the future development trends.
关键词
密文检索/可信执行环境/隐匿信息检索
Key words
Ciphertext retrieval/Trusted execution environment/Private information retrieval
维普
万方数据