Most security standards look at the crypto (the locks). ISO 17779 looks at the process (the proof of ownership). It specifies the "metadata" and "evidence" that must accompany a digital identity assertion. If you find the PDF, you will see a lot of flowcharts. But the standard rests on three critical pillars that matter to developers and compliance officers:
Let’s peel back the layers of ISO/IEC 17779. This isn't just another boring metadata specification. It is the legal and technical glue for , mobile driver’s licenses (mDL) , and the future of passwordless enterprise logins. What is ISO 17779 (In Plain English)? Forget the jargon for a moment. ISO/IEC 17779 defines a framework for authentication assurance . iso 17779 pdf
This is the standard's crown jewel. It isn't enough to present a certificate. You must provide evidence of recent control. This kills the "session replay attack." If you download a stolen ISO 17779 PDF and try to implement it poorly, you’ll miss the timestamps required for the Evidence of Control. Most security standards look at the crypto (the locks)
Think of it as the instruction manual for how a government or a bank answers the question: "How sure are we that the person holding the phone is actually the legal owner of this identity?" If you find the PDF, you will see a lot of flowcharts
If you are a lawyer or compliance officer: It is the only defensible document in court.
Most systems assume the person holding the device (Principal) is the legal entity (Owner). 17779 forces a split. It requires mechanisms to prove that the current user is authorized to act as the owner, even if they aren't the owner (e.g., a secretary signing for a CEO).
ISO 17779 PDF: The Hidden Standard Reshaping Digital Trust & eIDAS 2.0 Compliance