基于椭圆曲线ECELG密码体制的双重加密

椭圆曲线密码体制具有安全性高、密钥长度小和算法灵活等优点。在密钥长度不变的情况下，通过设置密码表和进行两次不同方法的加密，可以使椭圆曲线密码体制的安全性得到进一步提高。;Elliptic Curve Cryp to system (ECC) has many merits,such as high security, shorterkey size,flexible algorithm and so on.Under the situation of the fixed key size,these curity of ECC can be improved further by setting cryp to graphytable and encryption twice in two different methods