计算机软件的硬加密卡

提出了软件的一种智能硬加密方法．利用8位单片机、PCI总线结构设计了一种直接插在计算机总线上的硬件加密卡．加密程序设为中断程序，以陷阱中断的方式启动该中断程序．采用随机数实时核对加密方法，加密卡中随机数生成电路经A／D转换后、通过外部中断方式存入片内RAM中，成为被加密数．因该数是随机产生的，所以解密很困难．单片机与PC机间数据传输的端口地址译码采用GAL16V8完成，既具有保密性，又减少成本，节省了系统地址资源．

Computer Software's Hardware Encryption Card

This paper introduced an intelligent encryption method for computer software. By using a 8-bit single-chip and a PCI bus structure, a hardware encryption card was devised, which was directly inserted in the bus. The encryption program was designed as an interruption program, which started up with an interruption. By using the real time random number checking up encryption, the random number generated by the encryption card was stored in the RAM through external interruption after A/D transformation. It is difficult to decipher the encryption, because the number is generated randomly. A GAL16V8 chip was adopted as the port address decoder of data transmission between the single-chip and a personal computer. This encryption card needs far less address resource and is highly dependable as well as cost-effective.