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Rule n° 193 - Security certificates are signed and currently valid

The encounter of a site whose certificate is invalid or out of date causes alerts on the Internet user's computer. In a certain number of cases, these alerts will lead the user to leave the site immediately.

#Security #Development


  • Allow users to check the certificate’s validity and to contribute to transactional security.


Strictly monitor the security certificates used on the website, and anticipate renewal dates.


Check the validity of the certificate using an online tool, or using the tools provided by browsers

Most browsers also display an alert when they encounter an invalid certificate.

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The objective of these rules and the Opquast community mission is ‘making the web better’ for your customers and for everyone! Opquast rules cover the key major areas of risk that can negatively affect website users such as privacy, ecodesign, accessibility and security.

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