目前RSA公钥密码体制所采用的模幂运算耗时太多，处理大数据时速度很慢，所以提高运算效率便成为非常重要的研究课题，模重复平方算法通过实现指数约减达到简化计算的目的。-Currently consuming too much power operation mode RSA public-key cryptosystem used when dealing with large data speed is very slow, so improving operational efficiency will become a very important research topic, mold repeated squares algorithm by implementing the index minus about to simplify calculations purposes.