Zero-Knowledge Object-Comparison System Demonstrated in Nature Communications

CVT

Future arms control agreements may require trusted verification mechanisms aimed at confirming the authenticity of items presented as nuclear warheads. In the last five years, our team has been pioneering a warhead verification approach based on the cryptographic concept of zero-knowledge proofs. This approach could allow the authentication of nuclear warheads without sharing any design information.

The original idea was published in Nature in June 2014. Since then, we have been working on the development of a zero-knowledge object-comparison system and the procedures for its use in nuclear warhead inspections. The demonstration of such a system is now outlined in a Nature Communications article published on September 20, 2016.

For more information, you can check our zero-knowledge warhead verification project page. The Princeton Plasma Physics Laboratory has made a video about the experiments (see the press release here).

Alex Wellerstein has written a nice story about our work and experiments in the New Yorker.

A New Virtual Reality Presence at StudioLab

The Nuclear Futures Lab has recently established a presence at StudioLab — a new 2500 sq. ft space on campus developed by the Council on Science and Technology to bring together students, faculty and staff, independent of area of concentration, to explore the intersections and shared creativity across STEM, the arts, humanities, and social sciences. Programmatic initiatives within the StudioLab will include courses, labs, studios, research, projects, workshops and events.

The NFL recently installed its Full Motion Virtual Reality (FMVR) system in the space, which will give students and faculty new opportunities to conduct research through virtual reality. The NFL is currently using the system to design and examine new treaty verification systems and architectures for nuclear arms control. Notional facilities and weapons are built as 3D models, and when these are brought to life in FMVR, researchers are able to conduct live, immersive simulations that will help to hone effective verification options for future treaties.

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First Experimental Zero-knowledge

Already back in July, at the 2015 INMM Annual Conference, we reported initial results from the first zero-knowledge differential neutron radiographic measurements. To our knowledge, this was the first demonstration of a physical zero-knowledge proof of physical properties. This proof-of-concept constitutes a small but important first step toward an efficient zero-knowledge protocol for nuclear warhead authentication where sensitive information is never measured.

For this first demonstration, we tried to implemented all key steps of a zero-knowledge inspection using 14-MeV DT neutron radiography with test items represented by patterns of steel and aluminum cubes. We were able to preload the bubble detectors with the complement of the radiograph of a reference item and, by subsequent irradiation, verify whether items presented for inspection were identical to the reference item or not. We confirmed that the results yielded “zero information” when valid items were tested and successfully identified tampered items for four different diversion scenarios.

Watch this space for updates as we evaluate new measurements and write up the journal version of the paper.

It’s Official: $3.5M for Nuclear Disarmament Research at Princeton

CVT We are happy to announce that we are part of the consortium that has been awarded the $25 million five-year grant to improve nuclear arms control verification technology (see NNSA press release from March 31, 2014). The consortium will be led by the University of Michigan, and also involves MIT, Columbia, North Carolina State, University of Hawaii, Pennsylvania State, Duke, University of Wisconsin, University of Florida, Oregon State, Yale, and the University of Illinois at Urbana Champaign.

Princeton leads a key research thrust of the consortium focused on the relevant policy dimensions: “Treaty Verification: Characterizing Existing Gaps and Emerging Challenges.” Together with PPPL, we will also be able to expand our technical work on zero-knowledge approach to nuclear warhead verification and will be developing a virtual environment to support development, testing, and demonstration of verification approaches for these treaties. We will report regularly at nuclearfutures.princeton.edu on the progress of this exciting opportunity. Watch this space.