Authenticity

In practice it is about confirming that a software update or a message really comes from the expected source and was not changed. Code signing of updates is a common way to support it.

information, hardware, or software having the property of being genuine and being able to be verified and trusted; confidence that the contents of a message originate from the expected party and has not been modified during transmission or storage.

FDA guidance: Cybersecurity in Medical Devices: Quality Management System Considerations and Content of Premarket Submissions (February 2026), Appendix 5, Terminology