[generalizations]

How could it possibly still be secure, then? Also, I've never heard of that theory and it sounds interesting. Source?

[Itsdijital]

https://bitcointalk.org/index.php?topic=5313377.0

I'm not sure of the details and my understanding of it is limited. But it seems there is some kind of statistical anomaly in the nonces of early blocks, and some people suspect that he purposely formed this anomaly the leave a clue or encode the private key for the wallet.