the elliptic curve的用法和样例：
例句
- Implement a digital signature scheme based on elliptic curve cryptosystem.
实现了一种基于椭圆曲线密码体制的数字签名方案。 - At present, the Elliptic Curve Cryptography has the most secure private key when compared with other Public-Key Cryptography systems.
椭圆曲线密码体制是目前公钥密码体制中在密钥大小相当的情况下安全强度最高的一种密码体制。
