Object-oriented security chip and encryption method thereof

Abstract

The invention relates to an object-oriented security chip and an encryption method thereof. The security chip comprises a central processing unit (CPU), a symmetric cryptographic algorithm unit, an asymmetric cryptographic algorithm unit, a communication unit, a security protection unit, a data storage unit, an interruption source and a timer / counter, wherein the CPU is used for coordinating other functional modules in the security chip to ensure the normal operation; the symmetric cryptographic algorithm unit is used for implementing encryption and decryption operations on the data by adopting a national secret symmetric cryptographic algorithm; the asymmetric cryptographic algorithm unit is used for achieving signing and signature verification of digital certificates and calculating message abstracts and key negotiations between two communication parties by adopting a national secret asymmetric cryptographic algorithm; the communication unit is used for performing data communication; the security protection unit is used for guaranteeing the normal operation of the security chip; the data storage unit is used for storing keys; the interruption source is used for initiating an event interruption request to the CPU; and the timer / counter is used for counting and timing during the operation of the security chip. The encryption method of the security chip comprises the following steps: separately establishing a transmission layer security link and an application layer security link, and achieving the secure transmission of the information by adopting a transmission layer and application layer dual-layer protection mechanism.

Description

technical field [0001] The present invention relates to the technical field of information security, and more specifically, relates to an object-oriented security chip and an encryption method thereof. Background technique [0002] At present, various information collection systems have a higher degree of information integration and integration, stronger system dependence, richer and more frequent real-time interactions between business systems and between business systems and external users, and a large number of terminals connected to the system. The access methods and access environment of terminal equipment are relatively complex, and the amount of concurrency is relatively large, resulting in an increasingly complex operating environment and increasing information security threats from the public network. As an important medium for protecting terminal information security, security chips play an irreplaceable role in identification, security isolation, information encry...

AI Technical Summary

Problems solved by technology

However, most of the existing security chips use 7816 communication interface or single-channel serial peripheral communication interface SPI (Serial Peripheral Interface), the communication efficiency and concurrent processing capability are relatively low, and the security communication flexibility is relatively weak, which cannot meet the security requirements of object-oriented protocols. Transmission requirements, it is difficult to adapt to the complex business application environment of the current information collection system

Images