"Your connection is not private" with Chrome on Android Phone

This section provides a tutorial example on how to resolve the 'Your connection is not private' error with Chrome on Android phone.

In the last tutorial, we learned that Chrome 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 Chrome on your Android phone and enter the address of a Website that has an invalid certificate. An error message is displayed.

Your connection is not private

Attackers might be trying to steal your information
from some.domain.com (for example, passwords,
messages, or credit cards).
NET::ERR_CERT_DATE_INVALID

2. Tap on "Advanced". Detailed messaged of the certificate error is displayed. For example, if the certificate has expired, the message will say "its security certificate expired 60 days ago".

3. Tap on "Back to safety" to stop visiting the Website, if this is your financial Website.

4. Tap on "Proceed to some.domain.com" to ignore the error, if you are just surfing this 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.

'Your connection is not private' Error on Chrome
'Your connection is not private' Error on Chrome

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

 Visiting "https" Website with Chrome on Android Phone

"Your connection is not private" with Chrome on Android Phone

 Viewing Server Certificate with Chrome on Android Phone

 Viewing Server Certificate Path with Chrome on Android Phone

 Trusted Certificate Store on Android phone

 Downloading Trusted Root Certificate on Android phone

 Installing Trusted Root Certificate on Android phone

 Installing Website Server Certificate on Android Phone

 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