Prepare a talk to give at geek events

Originally created by @BitingBird on #6865 (Redmine)

We drafted a talk some months ago, the ideas should be published, made better, and some pretty images are needed (like some graphs…) so that we are ready to present Tails at any occasion :)

Related issues

Related to #6863

Edited May 15, 2020 by BitingBird

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