Unauthenticated sources

[JD]

How can I authenticate what Software Updater calls unauthenticated.


Software updater says:

Requires installation of untrusted packages

This requires installing packages from unauthenticated sources.

Details:

ffmpeg libav-tools libavcodec-extra-53 libavdevice53 libavfilter2 
libavformat53 libavutil-extra-51 libavutil51 libopencv-core2.3 
libopencv-imgproc2.3 libpostproc52 libswresample0 libswscale2 libtbb2