Yep, I took Boaz's crypto seminar, so I was looking for how this was different from his work. I couldn't find the full text of the article (maybe it isn't fully

Yep, I took Boaz's crypto seminar, so I was looking for how this was different from his work. I couldn't find the full text of the article (maybe it isn't fully published yet), but the supplemental information mention that one of the primary distinguishing factors is that this is not based on neutron scattering which apparently makes distinguishing between weapons-grade and depleted material easier.