"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.

'Cannot Verify Server Identity' Error on Safari
'Cannot Verify Server Identity' Error on Safari

Table of Contents

 About This Book

 Introduction of PKI (Public Key Infrastructure)

 Introduction of HTTPS (Hypertext Transfer Protocol Secure)

 Using HTTPS with Google Chrome

 Using HTTPS with Mozilla Firefox

 HTTPS with Microsoft Edge

 Using HTTPS with Apple Safari

 HTTPS with IE (Internet Explorer)

 Android and Server Certificate

iPhone and Server Certificate

 Visiting "https" Website with Safari on iOS 10 iPhone

"Cannot Verify Server Identity" with Safari on iOS 10

 Visiting "https" Website with Chrome on iOS 10 iPhone

 "Your connection is not private" with Chrome on iOS 10

 Installing Website Server Certificate on iOS 10 iPhone

 Trusted Certificate Store on iOS 10 iPhone

 Install Trusted Root Certificate on iOS 10 iPhone

 View Certificate Profile on iOS 10 iPhone

 Enable Full Trust for Root Certificate on iOS 10 iPhone

 Windows Certificate Stores and Console

 RDP (Remote Desktop Protocol) and Server Certificate

 macOS Certificate Stores and Keychain Access

 Perl Scripts Communicating with HTTPS Servers

 PHP Scripts Communicating with HTTPS Servers

 Java Programs Communicating with HTTPS Servers

 .NET Programs Communicating with HTTPS Servers

 CAcert.org - Root CA Offering Free Certificates

 PKI CA Administration - Issuing Certificates

 Comodo Free Personal Certificate

 Digital Signature - Microsoft Word

 Digital Signature - OpenOffice.org 3

 S/MIME and Email Security

 PKI (Public Key Infrastructure) Terminology

 Outdated Tutorials

 References

 Full Version in PDF/EPUB