Nothing man, just feeling tired and sleepy... Specially when it's cold outside I never seem to wake up. And I can never drink coffee so I don't know what's the best solution.
Encryption has to do with scrambling secret messages so that they can only be read by the person who has the key:
In cryptography, encryption is the process of transforming information (referred to as plaintext) using an algorithm (called cipher) to make it unreadable to anyone except those possessing special knowledge, usually referred to as a key.