Per
This work is licensed under a "by-nc-sa" Creative Commons License.
https://github.com/peermusic/peermusic
Send files peer-to-peer and end-to-end encrypted.
Concepts and features of the standard Android mail client.
About open source and why you should GPL your software.
For students of the hdm-stuttgart.de
Why secure data and how?
Why run a home server and what to do with it?
A "C-ish" introduction.