Breaking Beyond One: Mirage Attacks for Highly Accurate Multi-Keyword Query Recovery With Partial Similar Data Against SE

Searchable encryption (SE, a technique that lets users search encrypted databases while keeping queries private) can leak information through search and access patterns (what queries are made and which data is accessed). Researchers created Mirage, an attack that recovers both single-keyword and multi-keyword queries by exploiting these leaks while requiring only a small amount of similar documents (0.5% of the database), achieving over 90% accuracy on real-world datasets.