HTTPS (Hypertext Transfer Protocol Secure) with SSL/TLS encryption

HTTPS (Hypertext Transfer Protocol Secure) with SSL/TLS encryption protects data transmitted between the user's browser and the website's server. This encryption prevents unauthorized parties from intercepting and reading sensitive information such as passwords, credit card numbers, or personal data.

To check if a website has a valid SSL certificate, you can follow these steps:

1. Check the URL

Ensure the website URL begins with "https://" instead of "http://". The "https://" indicates that the site is using SSL/TLS encryption[1].

2. Look for the Padlock Icon

In your browser's address bar, look for a padlock icon next to the URL. This icon signifies that the connection is secure.

3. View Certificate Details

Google Chrome:
- Click on the padlock icon next to the URL.
- In the pop-up window, click on "Connection is secure".
- Click on "Certificate is valid" to view detailed information about the SSL certificate, including the issuer, validity period, and more[2].
Mozilla Firefox:
- Click on the padlock icon next to the URL.
- In the pop-up window, click on "Connection secure".
- Select "More Information" and then click on "View Certificate" to see detailed SSL information[2].
Microsoft Edge:
- Click on the padlock icon next to the URL.
- In the pop-up window, click on "Connection is secure".
- Click on "Show Certificate" to view the certificate details[2].

4. Use Online SSL Checker Tools

SSL Shopper: Enter the website's URL to check if the SSL certificate is correctly installed, valid, and trusted[3].
The SSL Store: Use their SSL Checker tool to verify the SSL certificate's installation and trust status[4].
DNS Checker: This tool checks the validity, issue date, and expiry date of the SSL certificate[5].

By following these steps, you can ensure that a website has a valid SSL certificate, providing a secure connection for data transmission.