Picto thématique

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The encounter of a site whose certificate is invalid or out of date causes alerts on the Internet user's computer.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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Business application and benefits

The rules should be applied to your projects from the design phase through to post-implementation , and they should be understood by all professionals with web and customer experience (CX) responsibilities: from strategy to operations, marketers to project managers, and editorial to technical staff. The benefits of using this ruleset are numerous, including improving customer satisfaction, web performance, and e-commerce, and expanding your client base, while also decreasing your errors and costs.

Multidisciplinary verticles - accessiiblity, SEO, e-commerce, ecodesign etc..- starting from the foundational Opquast base.

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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