报告名称：Security Analysis of Subterranean 2.0

主办单位：英国立博官网中文版

报告专家： 宋凌

专家所在单位：暨南大学

报告时间：2020年12月14日15:00-17：30

报告地点：腾讯会议，ID:806 586 114

专家简介：宋凌，暨南大学网络空间安全学院/信息科学技术学院研究员、博士生导师。2015年获中国科学院大学博士学位。曾于中国科学院信息工程研究所和新加坡南洋理工大学从事研究工作。研究方向为对称密码的分析与设计，获密码学会青年人才托举工程（2019-2021年度）项目，在Journal of Cryptology和CRYPTO、EUROCRYPT、ASIACRYPT、FSE等著名期刊和会议发表论文30余篇。

报告摘要：Subterranean 2.0 is a cipher suite that can be used for hashing, authenticated encryption, MAC computation, etc. It was designed by Daemen, Massolino, Mehrdad, and Rotella, and has been selected as a candidate in the second round of NIST's lightweight cryptography standardization process. Subterranean 2.0 is a duplex-based construction and utilizes an extremely simple one-round permutation in the duplex. It is the simplicity of the round function that makes it an attractive target of cryptanalysis. We examine the one-round permutation in various phases of Subterranean 2.0 and specify three related attack scenarios that deserve further investigation: keystream biases in the keyed squeezing phase, state collisions in the keyed absorbing phase, and one-round differential analysis in the nonce-misuse setting. A comprehensive analysis regarding these aspects is given in this talk.

邀请人：向泽军