Research On USB Security Key Model Designation

Along with the development of information technology (IT), especiallyelectronic business, the safety of information transmitting via Network is becoming the matter about which is most concerned. Research and design of cript security chip is a very popular subject in the cross field between criptogram and micro-electronics. Rapid development of modern electronic system integration technology and gradual perfect of crip theory provides strong support to the "birth" of security chip. Under this background, a thought of security key chip based on USB interface technology is brought up in this essay to meet the requirement of information safety. Following advanced design method and tools of SOC, design, prototype and evaluation of USB security key chip was initialized. Considering the high-speed circulation of current information, a hardware-encrypt method based on USB technology was proposed to solve this problem.Main research and outcome of this essay was described briefly as follows.USB Security Key basic knowledge was described and explained sysmetically,it's function and characteristics was analyzed. The model of USB Security Key was developed, and each part of the model was studied and analyzed. A conclusion was drawn that the most important thing in designing USB Security Key was the establishment of cryptogram protocol and the selection of cryptogram method.Analysis and research was done on the current mainstream cryptosystem, which includes public-key cryptosystem and private-key cryptosystem, and a comparison was made too. Research and comparison on RSA that is the representative public-key cryptosystem and DES that is the epresentative private-key cryptosystem were done,and then 3DES was brought up. With the analysis on RSA security, the construction of safe prime number was proposed. Hybrid cryptosystem based on RSA and DES was constructed through combining both traits of the public-key cryptosystem and the private-key cryptosystem.It was pointed out that ID Authentication and Digital Signature were the most important technologies to deal with secure transmission of information. The protocol...