This is actually a mistranslation. The original French text (https://clip-os.org/fr/ https://clip-os.org/fr/) says "système d’exploitation durci" (hardened ope

This is actually a mistranslation. The original French text (https://clip-os.org/fr/ https://clip-os.org/fr/) says "système d’exploitation durci" (hardened operating system) and this has been translated as "secure" in the English version of that same page.