关键词: 时间信道, 信息流, RSA算法, 硬件设计

Abstract: The attackers can extract the RSA private key by timing channel. Currently, there is a lack of effective method to detect and evaluate information leakage from RSA hardware timing channel. In this paper, Gate Level Information Flow tracking（GLIFT） method is employed to detect RSA timing channel and a test framework is proposed to evaluate RSA timing channel qualitatively and quantitatively. By case studies on 5 different RSA architectures, the experimental results show that the test framework can evaluate the effect of mitigation techniques on reducing and eliminating information leakage from RSA timing channel effectively and efficiently, which indicates that the test framework can help designers to tradeoff timing channel security, resource utilization and performance.

Key words: timing channel, information flow, RSA algorithm, hardware design