Take the 2-minute tour ×
Information Security Stack Exchange is a question and answer site for Information security professionals. It's 100% free, no registration required.

I am using internet by connecting mobile phone to my laptop using usb. From yesterday,my browser (firefox) shows like this for all most all website. Why this happen? How can i solve this?

share|improve this question
2  
If you want to know the technical details which make the certificate untrusted, then opening the technical details section might be a smart move. –  Thomas Pornin Oct 24 '12 at 17:07

2 Answers 2

up vote 3 down vote accepted

The date/time on your device maybe invalid.

All SSL certificates have a start and end period. Certificates can be compromised and its a good practice to renew them.

share|improve this answer
    
It's true this is a possible cause, but it would be more useful to the asker if you could give a brief explanation as to why. –  Iszi Oct 24 '12 at 17:54
    
@Iszi good point, updated –  Rook Oct 24 '12 at 19:23

Your mobile provider might be routing everything thru a proxy server that is doing SSL inspection, so it can do content filtering or bandwidth optimisation, which Firefox is detecting as a man-in-the-middle attack.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.