The Realization Of USB KEY With Dynamic Password Based On Z32U

Computer system security is an issue related to human life and survival event, the world has a major concern on it. Authentication technology is the modern network environment to ensure security of personal information users an important means. It has become the network security field and an important research topic.Traditional authentication systems generally use the "username + password" static certification and the "digital certificates + static password." The former can be easily stolen passwords by trojan program. As for the latter, digital certificate is still common in the form of a document stored in the computer, which also has been the illegal reproduction of the certificate of danger. Currently relatively safe and easy-to-use authentication method is the use of USB KEY storage users digital certificates. This paper analyzes the mainstream market-based 8 and 16-bit microprocessor USB KEY shortcomings (mainly Processor handling capacity insufficient to carry out complex encryption algorithm and the hardware itself easily resolve the shortcomings), Based on the 32-bit chip Z32U information security with LCD display dynamic password USB KEY the new program.This paper presents a classical encryption algorithm, USB Architecture and Z32U chip internal resources. The main contents include : 1. the hardware and circuit design and LCD module interface circuit design based on Z32U, 2. the USB Communication and firmware design based on Z32U, 3. self defined file system design based on Z32U, Two cited File System Implementation order and chain-store memory, and compare their advantages and disadvantages. 4. the AES encryption algorithm, and introduced the AES encryption algorithm in dynamic password authentication system applications. 5. realized Z32U and HT1621 LCD driver modules of the program design.In this paper, the design of based on Z32U with dynamic password USB KEY , make USB technology and dynamic password techniques together. As a result of the 32 information security protection from the chip hardware will not be overcome, and the use of 32-bit processor arithmetic processing capability, to achieve a high strength AES encryption algorithm. In this paper, based on the design of the custom file system, achieving a digital certificate users and users of personal information secure storage...