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I was browsing a while ago on youtube, I saw it shows an insecure connection even though it was over https.

enter image description here

I'm using ghostery and adblock to block trackers but nothing more, I don't think it's the reason because I always blocked trackers and this never happened to me before. I don't know if it is a bug or something. I tried to inspect the page with the dev tools in chrome, but didn't see anything rare, just that it's a valid certificate but no https connection

enter image description here

it didn't matter if go back to the main page, chrome was still showing non secure connection

of course when I close and re-open youtube the problem was gone.

Is this something insecure for cookies or they can never be sent in this case if they have an https only flag?

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    The security page of the developer tools (shown in the second screenshot), should give you a hint, why your browser states it's not a secure connection. – SaAtomic Aug 1 '17 at 5:25
  • @SaAtomic That is not a very helpful comment. Why not just tell what's going on? – Jan Doggen Aug 1 '17 at 7:22
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    @JanDoggen I do not know what is going on, I'm merely suggesting that the browser should give a hint about why the page isn't considered secure (which is possibly cropped from the screenshot). With this information a prober answer may be given. This problem does not occur for me. – SaAtomic Aug 1 '17 at 8:26
  • @SaAtomic no, I haven't cropped anything, in fact, the browser said the page was not secure and that i should not send any passwords or personal information, just the normal advice of an http connection – sshcarex Aug 1 '17 at 19:31
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    What's up with that font? Is that photoshopped in? – forest Sep 13 '18 at 1:22
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HTTPS not secure can be caused for multiple reasons but usually has to do with the certificate being used. In chrome you'll want to view the certificate details and see if anything is awry such as ... - untrusted issuer - name mismatch - date is expired - date is the future

It could also be that your PCs systems clock is way behind or way ahead causing chrome to think the certificate is bad when it really isn't.

Sites like YouTube are load balanced too so perhaps 1 of its 100 servers are hosting up an invalid certificate and you just happen to get that one.

Perhaps could also be related to ad advertisement or script being served up insecurely on HTTP.

This blog explains a bit https://www.rankya.com/how-to/how-to-fix-the-https-not-secure-message-in-google-chrome/

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    It isn't a certificate issue...The second screenshot shows that the certificate is fine. – Xander Jun 5 at 3:15

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