In the era of growing Internet surveillance, filtering, ACTA, 3-strikes and censorship, offline data sharing is becoming more and more important for freedom of communication. Centered around the projects Dead Drops by Aram Bartholl and PirateBox by David Darts, this masterclass aimed to find more and new ways to share data in an offline mode. What is the best way to send a file to a friend? How can I store data anonymously in public space? What are the best components to build up a local offline sharing grid?