As the International Committee of the Red Cross (ICRC) and other international organizations (IOs) are undergoing significant digital transformation and operate in an increasingly digitalized environment, questions as to how they can continue to ensure their information security are becoming more acute. Legal tools to protect IOs from harm in the digital age are central in this regard, alongside technical and organizational measures. This article focuses on one specific legal tool that can be used to foster IOs’ information security, namely legal interpretations of the concept of inviolability. Specifically, the article explores how the Agreement on the ICRC’s privileges and immunities in Luxembourg interprets the scope of the concept of inviolability, and the obligations arising under it.