7-7 Long Term Cryptography and Applications to Privacy-Preserving Data Mining

摘要

We develop a technique called Security-updatable Public-key Homomorphic Encryption with Rich Encodings (SPHERE), enabling both homomorphic operations and security-updatability over encrypted data. By SPHERE, it is possible to protect private data for the long term, while enabling the utility of encrypted data. We demonstrate that SPHERE can be useful in privacy-preserving data mining, especially when the data come from medical sources containing genomic information.