> The NIST collaborated with the NSA to put a backdoor in the Dual_EC_DRBG standard The version reported in the news at the time was that the NIST didn't know

> The NIST collaborated with the NSA to put a backdoor in the Dual_EC_DRBG standard The version reported in the news at the time was that the NIST didn't know about the back door, and was quite pissed off with the NSA when it was discovered. The Wikipedia article seems consistent with this? As for the rest, if you XOR multiple sources together, an adversary would have to compromise all of the sources in order to compromise the result.