Both of their security are based on the intractability of elliptic curve discrete logarithm problem.

两种方案的安全性都是基于椭圆曲线离散对数问题的难解性。

It is not that the problem has been solved, but, I think, that its intractability has sapped its interest.

不是因为这个问题被解决了，我想，而是因为太过棘手搞得人没啥兴趣了。

This is caused by increasing intractability, disease complications, and the premalignant nature of the disease.

这是由于增加的棘手性、疾病并发症和疾病癌前病变的本质。

The new scheme is secure under condition of intractability assumption of quadric remain and the security of RSA.

新方案效率高，在二次剩余困难假设和RSA安全的条件下是安全的。

The scheme is secure under the assumption of the intractability of logarithm problems and the random oracle model.

该方案在离散对数问题和随机预言模型假设下是安全的。