encryption

[zetaron]

a handler that allows encryption
therefor a modular system should be created to allow user specific encryption algorithms

[zetaron]

Add support for crypter registration just like it's possible to register handlers in the p2p class.

Perhaps include this to the p2p base class and then pipe every outgoing message through the encrypt function of the active crypter also do such a thing with the incoming packets but pipe them through the decrypt function of the crypter mentioned in the packet header

[zetaron]

consider usage of xz compression