Usb 2.0 Encrypted Interface Chip Design And Fpga Verification

The information-security has been widely attended both in people's daily life and the producting work..The most common method to enhance the information-security is Data-encryption.The software-encryption and the hardware encryption are the most common ways of the Data-encrytion methods.The software-encryption method has many disadvantages such as:low encrypt speed,low safety,and difficult to be settled,these disadvantage make the software-encrytion rarely used in Data-encrypt area.In substitute,the hardware-encryption can solve these problems easily. So nowadays,most important Data-encryption work use the hardware-encryption method.The hardware-encryption systems like the encrypt-dog and the encrypt-card has been widely used in the information-encryption domain.Based on the research of the encryption method described above,I found there are still many problems existed to be solved. The encrypt-dog and the encrypt-card use the multi-chip architecture (USB interface chip and the Encrypt-chip)to realize the USB communication and the Data-encrypt function.The original data can easily be listened and stolen from the USB chip,without the encrypt-chip process.I proposed a new kind of encrypt method named USB2.0 Encrypt Interface Chip(UEIC for short).The UEIC is based on the single chip,it can communicate according to the USB2.0 protocol and encrypt the data automatically by AES encrypt algorithm.The UEIC can communicate with the PC rightly and encrypt the data fastly,it provide the USB interface,support the self-initialization of the USB password carrier.According to the design concept,the paper research and design the whole hardware structure of the UEIC,a USBmodule and a AES encrypt module.Finally,the paper realise the function of the UEIC based on the FPGA chip,then test and analyse the performance of the UEIC's USB communication and its encrypt function.