Fault injection method and fault injection device for password chips

Abstract

The invention provides a fault injection method and a fault injection device for password chips, and relates to the technical field of password chips. The method comprises the steps as follows: randomly selecting multiple fault injection related parameter particles from a fault injection related parameter set; injecting a fault to a password chip according to D fault injection related parameters in each D-dimension vector; updating each dimension of fault injection related parameter in each D-dimension vector using a speed parameter; injecting a fault to the password chip again after updating; monitoring the frequency of effective error output for fault injection of the password chip according to each D-dimension vector; and executing the steps repeatedly until the frequency corresponding to a first D-dimension vector of the D-dimension vectors is greater than or equal to a preset threshold, and determining the D fault injection related parameters in the first D-dimension vector as preferred fault injection related parameters. According to the invention, the problem that selection of the required parameters from the parameter set by means of exhaustion is inefficient and results in slow password chip detection is avoided.

Description

technical field [0001] The invention relates to the technical field of cryptographic chips, in particular to a fault injection method and device for cryptographic chips. Background technique [0002] At present, as the core component of cryptographic equipment, cryptographic chips have powerful functions of authentication and storage of confidential information, and are widely used in telecommunications, finance, social security services and other fields. The security of the cryptographic chip itself is generally determined by the cryptographic algorithm, authentication method, and mathematical complexity of the security protocol it uses. However, the security of practical cryptographic systems (such as smart cards) is not only related to cryptographic algorithms, but also involves the implementation of cryptographic algorithms and hardware design. [0003] At present, more and more attention has been paid to the security testing of cryptographic chips. Fault injection ana...

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Problems solved by technology

[0005] Embodiments of the present invention provide a fault injection method and device for a cryptographic chip to solve the problem that the c

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