Key Decryptor?

What the hell is this.
I've heard of Key Loggers
but it's the first time I hear of a Key Decryptor.

It's a general cryptographic term referring to a module that decrypts a key using another key. You'll find these in particular with DRM systems. It has nothing to do with keyloggers.

In keyloggers, the "key" is the one you type.
In key decryptors, the "key" is a number.

You're telling me someone intercepts their internet traffic and hacks them like that?

lol...common whats the chance for the hacker intercepting the time your write your code and on top of that being a guildwars player and on top of that wanted to hack your account.

And I keep seeing Anet basicly tells anyone who has been hacked that it's a "key decryptor" if they don't know for sure ;P

No that's not what I'm saying.

Never heard of that. Source?

I agree with this post whole-heartedly. I really couldn't have said it better myself.
Key decryptors generally decrypt or retrieve keys, from a registry or database.

Thus proving that the security "experts" that work for PlayNC and ArenaNet are idiots. Decryptors are tools that remove encryptions from files via number to letter translation.

This is very easy to do; you just got to know what you're doing and looking at.
P.S. No, I am not going to tell you how.

Yeah A-Net tech really are not up to par vs. Security, just look at all the hacked accounts.