IE Supporting Multiple Certificate Paths

This section provides a tutorial example showing IE supports multiple certificate paths for 'login.yahoo.com'.

After deleted the root certificate "VeriSign Class 3 Public Primary Certification Authority - G5", which issued "VeriSign Class 3 Secure Server CA - G3", which issued "*.login.yahoo.com", I want to visit https://login.yahoo.com again with IE to see what will happen.

1. Run IE and go to https://login.yahoo.com and wait for the log in page to be displayed.

2. Click the lock icon at the end of the Web address field. A small pop up windows shows up.

3. Click the "View certificates" link on the pop up window. The Certificate dialog box shows up.

4. Click the "Certificate Path" tab. I am surprised to see that IE validated "login.yahoo.com" certificate with a new certificate path:

VeriSign Class 3 Public Primary Certification Authority (PCA3 G1 SHA1)
                                      - Root CA certificate
 |- VeriSign Class 3 Public Primary Certification Authority - G5
                                      - Intermediate CA certificate
     |- VeriSign Class 3 Secure Server CA - G3
                                      - An intermediate CA certificate
         |- *.login.yahoo.com         - Web server certificate

5. Remember the certificate path used by IE before I deleted "VeriSign Class 3 Public Primary Certification Authority - G5" certificate with a display of "VeriSign" from the trust root CA certificate tab. It looked like this:

VeriSign                                   - Root CA certificate
 |- VeriSign Class 3 Secure Server CA - G3 - Intermediate CA certificate
     |- *.login.yahoo.com                  - Web server certificate

The explanation is that there are two certificates with the same identity name "VeriSign Class 3 Secure Server CA - G3":

IE is smart enough to use a different certificate path to validate "login.yahoo.com" based on which root CA certificate is available.

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)

 Visiting "https" Website with IE

 Viewing Server Certificate Details in IE

 Viewing Server Certificate Path in IE

 Installing Server Certificate Permanently in IE

 Viewing Certificates in Certificate Stores in IE

 Listing of Trusted Root CA in IE

 Exporting Certificate to File from IE

 Saving Server Certificate to File with IE

 Deleting Certificates from IE

IE Supporting Multiple Certificate Paths

 IE Reinstalling Root Certificates Automatically

 Windows Automatic Root Update Mechanism

 Android and Server Certificate

 iPhone and Server Certificate

 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