No one could spy on other countries... bad people can group up over the internet and plan bad things...
jonnyt_
This is not THAT much different than now. Currently we have encryption that is FUNCTIONALLY unbreakable. This would just remove the extremely unlikely chance that brute force cracking happens to break the key quickly, rather than taking the average time of 100's of years. Especially now that we know P != NP.
Right now we have encryption that is, for all intents and purposes, unbreakable. With this options it would be COMPLETELY unbreakable. Not really much of a difference for day to day life.
jonnyt_
That said... mmmmmm cheeeese
jonnyt_
Another point here is that virtually all security breaches are not due to breaking the encryption. Usually it is due to weaknesses in the system which allow a hacker to BYPASS and IGNORE the encryption. Those are still all possible. Again, I think this would make almost no difference.