https://nakedsecurity.sophos.com/2015/03/18/double-freak-a-cryptographic-bug-that-was-found-because-of-the-freak-bug/ (Yeah, Naked Security is a very high-level blog, but they don't tend to make factual errors when explaining things) So, RNG failure when creating keys, again. No, OneRNG wouldn't help in this context :-)