I would say that government attempts to force data to be handed over reinforce the strength of public key encryption. Since Public Key made its debut, we've known that the only real actual threat to the system was an incredible advance in the realm of factoring. That has not happened.

This article talks about the many ways public key can be circumvented, but offers no insight into a mathematical breakthrough. Thus, there will remain a way to encrypt your data, you just need to make sure your keys will always be safe.