Bonjour,
For the record and in case someone has time to work on making it available to SecureDrop users in the future:
- https://dfd.inf.tu-dresden.de
- https://www.theregister.co.uk/2018/06/27/german_researchers_defeat_printer_tracking_dots/
- the software to fight dots https://github.com/dfd-tud/deda
Cheers