Bypass distinguisher method and system based on class separability criteria

Abstract

The invention discloses a bypass distinguisher method and system based on class separability criteria. The method includes the steps that after plaintext is input for hardware to be measured, an objective function is cyclically executed, and a power consumption curve generated in the execution process is collected; the intermediate value of each conjecture subkey is calculated; after the intermediate values are classified according to different classification structures, the divergence matrix criterion in each class is analyzed to obtain a corresponding statistical magnitude curve, and combination processing is carried out on obtained classification results to obtain comprehensive statistical magnitude curves of the conjecture subkeys; finally, the conjecture subkey corresponding to the comprehensive statistical magnitude curve with the highest peak value is a candidate key. The bypass distinguisher method and system based on class separability criteria are suitable for all application scenes of the DPA method, have higher universality than the DPA method and solve the problem of singular information utilization of the DPA distinguishing method; meanwhile, multi-point information utilization in DPA can be achieved, and analysis efficiency can be improved.

Description

technical field [0001] The present invention relates to a technology in the field of computer security, in particular to a bypass distinguisher method and system based on class separability judgment distance. Background technique [0002] In reality, cryptographic systems are usually implemented with hardware or software in the form of hardware, such as: smart cards, RFID, cryptographic coprocessors, SoC cryptographic chips, cryptographic machines, etc. In the implementation environment of these cryptographic systems, attackers can observe and measure information such as energy consumption and electromagnetic radiation of cryptographic transformations, and it is possible to use these additional information to achieve more effective cryptographic deciphering than traditional mathematical analysis. People usually refer to the attack in this environment as "Side Channel Attack (SideChannel Attack)". Side-channel attacks typically include Simple Power Analysis (SPA) and Differe...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects and deficiencies of the prior art, the present invention proposes a bypass distinguisher method and system based on class-separable distance judgment, which is applicable to all application scenarios of the DPA method, and is more versatile than the DPA method, and solves the problem of Typical DPA discriminant method information utilization single problem

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