Mr. Satoshi is really a genius in hidding.
Still today no one could find his identity, nor even the national agencies could make it.
Question:
Besides Tor and PGP, what technologies else did Satoshi use to protect his anonymity?
I don't know where you got he info that national agencies don't know who he is and that they tried to figure it out in the first place.
Bitcoin wasn't as popular back then, so he kind of kept a low profile and as I understand he went away just when things got him a bit of high profile.
It also isn't easy to retrospectively try to find out someone's identity, if they didn't monitor the Internet back then, then there would be little they could do now.
I somehow doubt that he used Tor and PGP has nothing really to do with anonymity, but with security.
He might have used some public Wifi and/or some proxies, I doubt he went very high tech.