[gsich]

https://media.ccc.de/v/31c3_-_6558_-_de_-_saal_g_-_201412282...

I'd believe him more then any other source.

[poizan42]

He did his presentation in english at FrOSCon 2015, can be seen here: https://www.youtube.com/watch?time_continue=95&v=c0O6UXrOZJo