PKI Tutorials - Herong's Tutorial Examples - v2.20, by Dr. Herong Yang
"Cannot Verify Server Identity" with Safari on iOS 10
This section provides a tutorial example on how to resolve the 'Cannot Verify Server Identity' error with Safari on iOS 10 iPhone.
In the last tutorial, we learned that Safari will display lock icon, if the HTTPS Website has a valid certificate. Here is what will happen if the Website has an invalid certificate.
1. Run Safari on your iPhone and enter the address of a Website that has an invalid certificate. An error message is displayed.
Cannot Verify Server Identity The identity of "..." cannot be verified by Safari. Review the certificate details to continue.
2. Tap on "Details". The certificate details are displayed. You may see that the certificate has expired. Or this is a self-signed certificate.
3. Tap on "Cancel" to stop visiting the Website, if this is your financial Website.
4. Tap on "Continue" to ignore the error, if you are just surfing this Website. The confirmation screen is displayed.
5. Tap on "Trust" to confirm that you want to continue visit the Website.
Note that an invalid certificate could be the result of a man-in-the-middle attach, where a hacker secretly intercepts the communication between you and the Website. The hacker also replaces the original server certificate with his/her fake certificate.
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