时间:2017年5月26日上午9:30
地点:学院B403报告厅
报告题目：FourQ on Embedded Devices
报告摘要：This work deals with the energy-efficient, high-speed and high-security implementation of elliptic curve scalar multiplication and elliptic curve Diffie-Hellman (ECDH) key exchange on embedded devices using FourQ and incorporating strong countermeasures to thwart a wide variety of side-channel attacks. First, we set new speed records for constant-time elliptic curve scalar multiplication and ECDH key exchange with implementations targeting 8, 16 and 32-bit microcontrollers. For example, our software computes a static ECDH shared secret in 7.2 million cycles (or 0.9 seconds @8MHz) on a low-power 8-bit AVR microcontroller which, compared to the fastest Curve25519 and genus 2 Kummer implementations on the same platform, offers 1.9x and 1.4x speedups, respectively. Similarly, it computes the same operation in 559 thousand cycles on a 32-bit ARM Cortex-M4 microcontroller, achieving a factor-2.5 speedup when compared to the fastest Curve25519 implementation targeting the same platform. Second, we engineer a set of side-channel countermeasures taking advantage of FourQ's rich arithmetic and propose a secure implementation that offers protection against a wide range of sophisticated side-channel attacks, including differential power analysis (DPA). Despite the use of strong countermeasures, the experimental results show that our FourQ software is still efficient enough to outperform implementations of Curve25519 that only protect against timing attacks.
Finally, we perform a differential power analysis evaluation of our software running on an ARM Cortex-M4, and report that no leakage was detected with up to 100,000 traces.
These results demonstrate the potential of deploying FourQ on low-power applications such as protocols for IoTs.
报告人简介：刘哲，目前在卢森堡大学安全与信任中心（SnT）从事研究工作（Research Associate）。2015年11月于卢森堡大学(University of Luxembourg)算法、密码与安全实验室获得博士学位，2015年12月到2017年4月在加拿大滑铁卢大学量子研究中心和应用密码研究中心从事博士后研究工作。博士期间，以访问学者身份分别在香港城市大学，比利时（荷兰语）鲁汶大学以及微软总部研究院密码与安全组分别进行访问。刘哲的博士毕业论文“Lightweight Public-Key Cryptography for Wireless Sensor Nodes”获得卢森堡国家基金委2016年评出的唯一杰出博士毕业论文奖(Outstanding Ph.D Thesis Awards)，他也成为了该奖项第一位华人获得者，卢森堡国家基金委，卢森堡大学以及滑铁卢大学量子研究中心进行了专题报道。刘哲已经在国内外密码学术期刊和会议上发表学术论文50多篇，其中20多篇发表在安全类著名期刊和会议上，包括IEEE Transactions on Computers (IEEE TC), IEEE Transactions on Dependable and Secure Computing (IEEE TDSC), IEEE Transactions on Information Forensics and Security (IEEE TIFS); ACM Transactions on Embedded Computing Systems (ACM TECS) 和 IACR Conference on Cryptographic Hardware and Embedded Systems (CHES)，Computers & Security, Science China (中国科学) 等。刘哲目前担任4个著名安全类期刊的编委，10几个期刊的客座编辑（包括IEEE Transactions on Computers, IEEE Transactions on Emerging Topics in Computing）以及20多个安全类国际会议的程序委员会委员。
