I receive this message when I login to my system :
Apt Authentication issue
The package list update failed with a authentication failure. This usually happens behind a network proxy server. Please try to click on the "Run this action now" button to correct the problem or update the list manually by running Update Manager and clicking on "Check".
I believe that my isp trying to fool me to get some malicious software installed on my system through altering some software that I should get for upgrade, what counter actions can I do ? where can I find the temporary list to compare the fake list to the original list and find the difference ??
Note : I don't use a proxy at all !