Devices employing cryptographic approaches have to be resistant to physical attacks. Side-Channel Analysis (SCA) and Fault Injection (FI) attacks are frequently used to reveal cryptographic keys. In this paper, we present a combined SCA and laser illumination attack against an Elliptic Curve Scalar Multiplication accelerator using a differential probe from Teledyne LeCroy. Our experiments show that laser illumination increases the power consumption of the chip, especially its static power consumption but the success of the horizontal power analysis attacks was changed insignificantly. We assume that using a laser with a high laser beam power and concentrating on measuring and analysing only static current can improve the attack success significantly. The horizontal attacks against public key cryptosystems exploiting the Static Consumption under Laser Illumination (SCuLI attacks) are novel and their potential is not investigated yet. These attacks can be especially dangerous against cryptographic chips manufactured in scaled technologies. If such attacks are feasible, appropriate countermeasures have to be proposed in the future.

翻译：采用密码学方法的设备必须能够抵御物理攻击。侧信道分析（SCA）和故障注入（FI）攻击经常被用于揭示加密密钥。本文针对采用Teledyne LeCroy差分探头的椭圆曲线标量乘法加速器，提出了一种结合SCA与激光照射的攻击方法。实验表明，激光照射增加了芯片的功耗，特别是静态功耗，但水平功耗分析攻击的成功率变化不显著。我们假设，使用高功率激光束并专注于仅测量和分析静态电流，可以显著提升攻击成功率。利用激光照射下静态功耗攻击公钥密码系统的水平攻击（SCuLI攻击）具有新颖性，其潜力尚未被充分研究。此类攻击对采用先进工艺制造的密码芯片尤为危险。若此类攻击可行，未来需提出相应的对抗措施。