Homomorphic encryption is interesting from a business standpoint (think: manipulating credit card numbers without being able to read them). For anonymization s

Homomorphic encryption is interesting from a business standpoint (think: manipulating credit card numbers without being able to read them). For anonymization systems, care must be taken: being able to manipulate encrypted data could very well create information leaks. There have been some interesting theoretical uses of the Pallier cryptosystem in private information retrieval systems, though.