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SSL Certificates

2 min read

What Is an SSL Certificate?

An SSL certificate ensures a secure connection between a server and the user's browser.

The main functions of an SSL certificate are:

  • Protecting user data in transit, including card transactions and login credentials.
  • Linking an encryption key to an organisation's details.
  • Verifying the identity of an organisation and/or domain.

SSL certificates are small data files that link an encryption key to an organisation's details, or to an individual's details if the certificate is issued to a person. When browsing a website, an SSL certificate provides a secure connection between the web server and browser, indicated by a closed padlock in the address bar and the prefix «https» at the beginning of the page address.

SSL certificates are particularly important for online stores, banks, payment systems and other organisations handling personal data, helping protect transactions and prevent unauthorised access to information. Websites with SSL certificates also have an advantage in search rankings.

Information an SSL Certificate Can Contain and Verify

An SSL certificate may contain the following information:

  • The domain name covered by the certificate.
  • Details of the person or organisation to which it was issued.
  • The certificate holder's physical location, including city and country.
  • The certificate's validity period.
  • Details of the SSL certificate provider.

Checking an SSL Certificate

Various tools can help you check whether an SSL certificate is installed and view the details supplied when it was ordered. Here are some examples:

  • DigiCert SSL Installation Checker — provides detailed, accurate information for checking whether an SSL certificate is installed and working correctly.
  • SSL Shopper — quickly checks the server type, CA bundle, expiry date and storage network. It helps identify errors and determine why a certificate is not working correctly.

You can also check that the certificate and private key match to confirm that the SSL certificate is installed and working correctly.

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