T/CTS 11-2023 Car DVR data security chip technical requirements

Scope

Scope: This document specifies the general requirements, functional requirements, performance requirements, test methods, and packaging for data security chips applicable to car recorders. This document applies to the design, manufacture, and use of data security chips for various types of car recorders installed in vehicles. Main technical content: The data security of car recorders is a technical guarantee for the availability, reliability, and credibility of recorded data. To achieve the security performance requirements of preventing data deletion, forgery, and tampering in car recorders, it is necessary to encrypt and store the original recorded data or verify it with encrypted digital signatures with time-stamp features, and at the same time, provide necessary protection against deletion for the memory storing the recorded data. This requires the car recorder itself to have a security boundary capable of implementing these data security functions, and the use of security chips with specific functions is the most cost-effective technical means and common practice for establishing a high-level security boundary and implementing data security functions. At the same time, data security chips can also provide technical means for ensuring the high-level security of the car recorder's own networking, system, and software. The security functions of car recorder data security chips are implemented using a sequence of self-controllable national commercial cryptographic algorithms (SM1, SM2, SM3, SM4, etc.), while being compatible with internationally common security algorithms. This is of great significance for promoting the widespread application of our country's commercial cryptographic algorithms and popularizing and implementing the "People's Republic of China Cryptography Law".

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