PGP Software
- Mail client Thunderbird: https://www.mozilla.org/de/thunderbird
- with Plugin Enigmail: https://www.enigmail.net/index.php/en/download
Guides
- Linux: https://wiki.fsfw-dresden.de/doku.php/doku/software/gpg/gpg_anleitung_linux
- Windows: https://wiki.fsfw-dresden.de/doku.php/doku/software/gpg/gpg_anleitung_windows
- OS X: https://gpgtools.tenderapp.com/kb/how-to/erste-schritte-gpgtools-einrichten-einen-schlssel-erstellen-deine-erste-verschlsselte-mail
Gefährder
- some law: https://www.gesetze-im-internet.de/stpo/__100a.html
- Andrej Holm: https://www.youtube.com/watch?v=BedqxPRNcYY
Other
Tails: https://tails.boum.org
Tor: https://www.torproject.org
Alternative phone OS: https://www.lineageos.org
Visite your local hacker space: https://wiki.hackerspaces.org/List_of_Hacker_Spaces
Other software alternatives: https://prism-break.org/de
ABCDD Security Guide: https://abcdd.org/en/security-guide-2
Instant messenger
- Jabber/XMPP
- Conversations (Android) https://conversations.im/
- Gajim (BSD, Linux, Microsoft Windows) https://gajim.org
- Signal https://signal.org
- Wire https://wire.com/en/download/
- Riot.im (Matrix) https://riot.im