[MarcScott]

I wonder if I were to locally encrypt a message using AES and then send it via email to a friend, using a pre-shared key, whether I would be breaking the law or not, in Cameron's Brave New World?

If the answer is yes, then how about the Vigenere cipher? The Caesar Cipher? 1337 speak? Writing my message backwards? Making spelling mistakes?

[pizzeys]

Heaven forbid you use a one-time pad...

[LLWM]

You just need to give GCHQ a copy of the key.

[kondro]

Yes, because of his intent for the changed law.