Original sentence: Given the importance of having secure random number generators in cryptology, in certain cases it may be desirable to sacrifice speed for security.Subsequent to the standardization of the Dual_EC_DRBG, various researchers have reported certain security of the properties of the Dual_EC_DRBG:.The security requires that a certain problem be hard, but one of the recommended configurations of the Dual_EC_DRBG allows for the possibility that a key has been retained to solve this problem.The sequence of bits generated from the Dual_EC_DRBG, under certain parameter choices, can be distinguished from uniformly random bits, making its output unsuitable for use as a stream cipher, and arguably for more general uses
Edited sentence: Given the importance of having secure random number generators in cryptography, in certain cases it may be desirable to sacrifice speed for security.Its security requires that a certain problem be hard, but one of the recommended configurations of the Dual_EC_DRBG permits the possibility a key, which facilitates solution of the problem, has been retained.Subsequent to publication of the Dual_EC_DRBG algorithm, various researchers have reported certain security of the properties of the Dual_EC_DRBG:.The sequence of bits generated from the Dual_EC_DRBG, under certain parameter choices, can be distinguished from uniformly random bits, making its output unsuitable for use as a stream cipher, and, arguably, for more general use