Working in IT for a few years in France, my guess is that this is a direct translation of a term (sensible) which refers to personally identifying information s

Working in IT for a few years in France, my guess is that this is a direct translation of a term (sensible) which refers to personally identifying information such as address or date of birth, and not some military secret. In this case, they want to provide some isolation but don’t expect to protect against ground breaking attacks like Spectre.