Public-key encryption scheme based on R-LWE
Wei Zhang · Journal of Communications · 2013
An improved method of generating trapdoor on ideal lattice was proposed by a stronger regularity bound theorem,then with R-LWE encryption algorithm and strongly unforgeable one-time signature tool from ideal lattice,an adaptive chosen-ciphertext attack(CCA) secure PKE scheme under the standard model was designed.The new PKE scheme supported public ciphertext integrity verification,could achieve block encryption and had a high encryption/decryption speed and a low encryption blowup factor,whose security proved reduced to decisional R-LWE assumption tightly.The construction is the first CCA-secure PKE cryptosystem completely based on hard problems from ideal lattice.