@gavinisdie
"Proof of Work" is one part of Bitcoin. Because nobody trusts noone, you need something that nobody can easily fake. That's computing power. So you create a benign challenge that is very hard to solve and if you solve it, you get a reward.
The challenge is intentionally so hard that all computers create roughly one block every 10 minutes. If more computers are added, the problem just gets (artificially!) harder. @masek@tkinias
claudius