175-bits ECC defined over optimal extension field (OEF) GF((229-3)7)and 176-bits genus two HECC defined over OTF GF((222 -3)22) are implemented. The performance of two cryptosystems is compared and analyzed in detail.

• 实现了最优扩域GF((2~(29)-3)~7)上175比特的椭圆曲线密码体制以及最优塔域GF((2~(22)-3)~(2~2))上176比特亏格为2的超椭圆曲线密码体制，对两个密码体制的性能作了详尽的比较与分析。