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This question already has an answer here:

In light of the Open SSL Heartbleed bug, I'd like to make sure I'm not putting any personal information in any system that is using Open SSL that is vulnerable.

So, from my browser (IE 11) how can I tell if 1. a website is using Open SSL, and 2. if so, what version of Open SSL?

I know I can view the security certificates by clicking on the little lock in the address bar, but from what I see, there's nothing that says Open SSL, nor the version.

Thanks.

marked as duplicate by AviD Apr 10 '14 at 13:24

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You're not able to tell from version info, mostly because you can't guarantee that it's accurate or even available.

Browser plugins are check sites are surfacing that allow you essentially test the exploit to identify if the site is vulnerable and that's really the only way to know for sure.

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