面向密码算法的异步可重构结构设计

针对FPGA和ASIC在实现密码算法时的不足之处，本文介绍了一种面向密码算法的异步可重构结构。该结构的运算功能由一个可重构单元阵列提供，数据通路由可重构单元之间的相互连接实现，异步通信采用握手信号完成。在分析握手信号传输延时对可重构结构的影响后，文章提出了一种适合该结构的单元信号传输握手控制电路。同时在单元结构中，使用改进的DSDCVS逻辑来设计其运算电路，减小了单元的面积，提高了单元的工作速度。应用实例表明，在实现密码算法时，面向密码算法的异步可重构结构表现出了比FPGA更好的性能。

Design of a Novel Asynchronous Reconfigurable Architecture for Encryption

To overcome inherent shortages of FPGA, as costly area and power for well routing resource, and ASIC, as flexibility lost, a novel asynchronous reconfigurable architecture was introduced. This architecture is suitable for encryption. In the architecture, reconfigurable cells array is the kernel. It routs signals asynchronously between adjacent cells through Neighbor-to-Neighbor wires with 4-phase handshaking protocol. Wire delay of handshaking signals was analyzed seriously, and a meliorated control circuit in cell was proposed. Computation circuit for reconfigurable cell was developed with modified DSDCVS logic. On the implementation of encryption algorithm such as Montgomery algorithm, the architecture shows a better performance than FPGA.