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Arms control treaties are necessary to reduce the large stockpiles of the nuclear weapons that constitute one of the biggest dangers to the world. However, an impactful treaty hinges on effective inspection exercises to verify the participants' compliance to the treaty terms. Such procedures would require verification of the authenticity of a warhead undergoing dismantlement. Previously proposed solutions lacked the combination of isotopic sensitivity and information security. Here we presentdoi:10.1038/s41467-019-12386-0 pmid:31570714 pmcid:PMC6769018 fatcat:ytp66ow5ybgiphyydulq33om2e