Shai Halevi Yuriy Polyakov Victor Shoup An Improved RNS Variant of the BFV Homomorphic Encryption Scheme. 83-105 2019 CT-RSA https://doi.org/10.1007/978-3-030-12612-4_5 conf/ctrsa/2019 db/conf/ctrsa/ctrsa2019.html#HaleviPS19