基于NiosⅡ的U盘安全控制器设计与实现

摘要

针对U盘等存储设备的安全隐患及用户的安全需求,分析目前常见的解决方法,遵循灵活方便、高安全性的原则,利用SoPC技术,设计实现了一款基于NiosⅡ的U盘安全控制器.详细论述了安全控制器的系统设计、硬件架构、固件划分和工作流程.采用高强度的密码算法,对普通U盘中的数据进行扇区级的加解密,保证U盘中数据的安全,具有灵活安全、易于升级的特点.%Aiming at the security risk of usb mass storage device and users ' need, analysis the common method, following the principle of high convenience and security, an usb disk security controller based on Nios II is designed and implemented in this paper, which uses the SoPC technology. The security controller's system design, hardware architecture, firmware partition and work flow are introduced detailedly. The controller ensures the security of data by decrypting on sector level, which has the characters of high security and easy to upgrade.