Safety detection method and device for cipher chip

Abstract

The invention relates to a safety detection method for a cipher chip. The method comprises the following steps: carrying out laser injection on the cipher chip at one or more first laser injection points according to a laser attack strategy, so that the cipher chip generates one or more first cipher texts; analyzing the one or more first cipher texts, and screening out one or more second laser injection points, which comply with the laser attack strategy, from the one or more first cipher texts, wherein the one or more first cipher texts are respectively associated with the one or more first cipher texts; carrying out laser injection on the cipher chip at the one or more second laser injection points at different laser triggering times; screening out one or more third laser injection points, which comply with the different laser triggering times, from the one or more second cipher texts generated by the cipher chip, wherein the one or more second cipher texts are respectively associated with the one or more second laser injection points; and carrying out key analysis according to the one or more third laser injection points to obtain a key for recovering the cipher chip.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a method for detecting security of a cryptographic chip and a device thereof. Background technique [0002] A cryptographic chip refers to an integrated circuit chip that implements one or more cryptographic algorithms and uses a cryptographic system to protect keys and sensitive information. The core of a cryptographic chip is usually an intelligent CPU chip that can run cryptographic algorithms. At present, encryption chips have been widely used in government affairs, finance, public security, national defense, civil affairs, communications, transportation, health, education, logistics, water, electricity and other fields. These fields are related to public security and economic and social development. The core foundation of information system security. Therefore, the development of security detection technology for cryptographic chips is very critica...

AI Technical Summary

Problems solved by technology

At present, the existing detection methods of laser injection into cryptographic chips lack the precise control of laser energy, the observation of the internal structure of cryptographic chips, and the lack of coordinated control of laser injection time and space.

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