Such training does not exist anywhere on this planet.
Edit:
I already mentioned SERE training in a higher level post. It's pretty intense, but still, the most valuable lesson you learn is that everyone will end up talking.
I was simply commenting on the possibility of a person resisting torture. If that person has some sort of safety mechanism in place, the torturer might not be able to get the information he wants, but that's not because the victim has resisted, because he won't.
Many US military personnel go through SERE[1] training, which includes some rather unpleasant things, and other countries have similar programs (The UK RTI[2] for one example).
Obviously a group less concerned about the long-term health of their interrogatees have a lot more flexibility in methods, and training is largely understood to be a delaying tactic to spoil time-sentitive tactical data, rather than resist interrogation indefinitely.
Hypothetically, there could be a mechanism by which he has to check in with some associates periodically, who by means of some N of M secret sharing are able to destroy/release the data otherwise. Then you need to resist for only 1-2 checkin periods. Or have a duress codeword that causes the same result. Any destruction scheme requires that the data be held somewhere secure enough not to be cloned though.
(And any heartbeat type scheme requires periodic communication with some/all associates, possibly leading your adversary to them, although broadcast media is probably good enough while he's mainstream news)
If they abduct and torture you immediately, the chances of you stalling for x hours is pretty much non-existent. Snowden is in Russia. Arguably, no nation on the planet is better at torturing people than they are, and unlike the U.S. Russia doesn't really give a shit if the rest of the world doesn't like their methods. His interrogation would likely take minutes, not hours.
Edit:
I already mentioned SERE training in a higher level post. It's pretty intense, but still, the most valuable lesson you learn is that everyone will end up talking.
I was simply commenting on the possibility of a person resisting torture. If that person has some sort of safety mechanism in place, the torturer might not be able to get the information he wants, but that's not because the victim has resisted, because he won't.