An Authentic Digital Emblem

The emblems of the red cross, red crescent, and red crystal mark physical infrastructure in times of armed conflict. ADEM extends this protection to digital, network-connected infrastructure through a digital emblem.

An Authentic Digital EMblem (ADEM) is a proposal to implement a digital emblem, analogous to the protective, physical emblems of the red cross, red crescent, and red crystal. ADEM was developed by Felix Linker and David Basin at the Centre for Cyber Trust, a joint research centre between ETH Zurich and the University of Bonn.

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Features of ADEM


ADEM has no single point of failure. Parties deploy ADEM independently.


ADEM has no central authority. Nations use ADEM fully sovereign.


ADEM requires no updates to the Internet's infrastructure.

Covert Inspection

No one can tell whether you look at emblems.


Emblems form irrefutable proof. Misbehavior can be held accountable.


Every network-connected asset can be labelled.