An MIT Trick: Computing On Encrypted Databases Without Ever Decrypting Them
http://www.forbes.com/sites/andygreenberg/2011/12/19/an-mit-magic-trick-computing-on-encrypted-databases-without-ever-decrypting-them/Original paper, CryptDB: Protecting Confidentiality with Encrypted Query Processing http://people.csail.mit.edu/nickolai/papers/raluca-cryptdb.pdf