content: I think it's likely they realized how difficult their task would actually be (given the current estimates for cracking those hashes) and decided that multiple decades (or hundreds of years) for cracking one hash let alone "all" hashes would take too long to impose their will upon the people. Exposed private key is tantamount to "I want it now!" mentality that the government has a tendency to have. Edit: Of course, that's with current systems; however, we're still advancing at a ridiculous rate... But by the time the hardware can crack it in any reasonable amount of time, hopefully we have better encryption released by those who want to protect humanity and not help the government.