Sebastiaan de Hoogh Berry Schoenmakers Boris Skoric José Villegas Verifiable Rotation of Homomorphic Encryptions. 393-410 2009 Public Key Cryptography http://dx.doi.org/10.1007/978-3-642-00468-1_22 conf/pkc/2009 db/conf/pkc/pkc2009.html#HooghSSV09