How can I get the public key of a webpage?

Question

How can I get the public key of a website, such as VeriSign, and all other websites that use the https protocol (secure protocol)?

Answer 1

It depends on the browser you use, if you let me know, I will update my answer.

Chrome 55 and later Now you can find this information in the Developer Tools. Options (3 points) → Additional tools → Developer tools or press F12, then go to the "Security" tab and you will get a "Security Overview" using the "View Certificate" button. According to another SO post from Chrome 60, you can turn this option back on if you go to chrome://flags/#show-cert-link .

Chrome 54 and below: If you use Chrome, then click the green bar to the left of “https:” in the address bar, for the VeriSign website the green bar says Symantec Corperation [US] , this will open a pop-up window. On the pop-up window, click "Certificate Information". This will open another popup. On this Details tab, go to the top and scroll down to the Public Key, which shows the public key that the website uses SSL for it. In the case of VeriSigns, the public key is a 2048 bit key.

IE: The green bar to click on is located to the right of the web address. When you click this button, a similar pop-up window appears where you should click "View Certificates", which then displays the same as in Chrome, where you go to the "Details" tab and scroll down to "Public Key"

This is a pop-up window that opens after clicking the "Certificate Information" or "View Certificates" links.

Answer 2

In Chrome, you can get it through the developer tools (F12 in the windows) or select it in the menu (Menu → Advanced tools → Developer tools).

Then you just need to select the security tab, here you have all the necessary information.

Just clicking on a protected popup no longer works.