Picto thématique

Rule n° 209 - Integrity control of third party resources is present and valid.

It is possible to verify that the third-party resources (files scripts, style sheets ...) have not been modified to insert malicious code. For this, the server will continuously check the sent files are the correct files. This rule encourages the implementation of this security measure.

#Security #Development


  • Prevent the appearance of malicious content or scripts on the site


Use the integrity attribute of each link and script element (calling an external file) to provide the browser with the cryptographic hash (SRI hash) that should correspond with the file.

Find out more:


Check for each link and script element (calling an external file) that the integrity attribute indicating the cryptographic hash (SRI hash) is present that should correspond with the file.

By Opquast - Read the license

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.

Opquast training has already allowed over 11,000 web professionals to have their skills certified. Train your teams or your students, contact us