学术报告(潘彦斌、赵运磊 9.22)

发布人:周妍 发布日期:2019-09-17
活动时间
-
活动地址
数学楼415报告厅

1、潘彦斌 副研究员 中科院数学与系统科学研究所   10:00-11:00

题目:It All Started with Compression: Another Look at Reconciliation-Based LWE Key Exchange

摘要: To embrace the increasing challenge from the growth of quantum threats, there emerge a lot of quantum-resist key exchange scheme based on (Ring-)LWE problem. The reconciliation technique has become a crucial building tool for the vast majority of (Ring-)LWE key exchange schemes where two parties in communication try to eliminate the effect of the errors introduced by the underlying intractable problem and agree on a common value.

 However, the construction of these reconciliation mechanisms appears to be tricky and obscure.  In this work we analyze some typical reconciliation mechanisms and  present a framework to derive these reconciliation mechanisms and corresponding key exchange schemes from some public key encryption schemes with compression. Our encryption-based approach leads to a unified and clearer interpretation of reconciliation technique and simplifies the design of (Ring-)LWE-based key exchange scheme. With this point of view, we also present some new encryption-based key exchange schemes as applications.

2、赵运磊  教授  复旦大学

题目:格编码和基于配对的身份基匿签密

摘要:格编码在后量子密码方案设计的一个基础工具。本报告介绍E8格编码,和基于E8格编码的效率优化的格基公钥加密方案设计于分析。匿签密是将身份认证、公钥加密和身份匿藏有机结合的新型密码原语,报告介绍基于配对的身份基匿签密方案设计与分析。