Which of the following encryption methods is known to be unbreakable?下面哪一个加密算法被认为是不可破解的？（）A、Elliptic Curve Cryptography.椭圆曲线加密B、One-timepads.一次性随机密钥C、Symmetric ciphers.对称密钥D、DES codebooks.DES密码本
Which of the following encryption methods is known to be unbreakable?下面哪一个加密算法被认为是不可破解的？（）
- A、Elliptic Curve Cryptography.椭圆曲线加密
- B、One-timepads.一次性随机密钥
- C、Symmetric ciphers.对称密钥
- D、DES codebooks.DES密码本
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