Mimi: Dynamically Secure Multi-Keyword Retrieval Scheme With Two-Factor Verification

Summary

Mimi is a multi-keyword search scheme for encrypted data that adds two-factor verification, aiming to fix weaknesses in existing privacy-preserving retrieval schemes. It uses a dynamic verification tree to check returned results, an encrypted searchable inverted index with sub-linear search time, and a secure symmetric key exchange protocol. The authors report security analysis and empirical evaluations but give no numbers in the source text.