@misc{cryptoeprint:2015:1132, author = {Katsuyuki Takashima and Atsushi Takayasu}, title = {Tighter Security for Efficient Lattice Cryptography via the R\'{e}nyi Divergence of Optimized Orders}, howpublished = {Cryptology ePrint Archive, Report 2015/1132}, year = {2015}, url = {https://eprint.iacr.org/2015/1132}, }