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A single-qubit position verification protocol that is secure against multi-qubit attacks. (arXiv:2104.06301v3 [quant-ph] UPDATED)
cs.CR updates on arXiv.org arxiv.org
The position of a device or agent is an important security credential in
today's society, both online and in the real world. Unless in direct proximity,
however, the secure verification of a position is impossible without further
assumptions. This is true classically, but also in any future quantum-equipped
communications infrastructure. We show in this work that minimal quantum
resources, in the form of a single qubit, combined with classical communication
are sufficient to thwart quantum adversaries that pretend to be …
agent attacks communications credential device future important infrastructure protocol quantum qubit resources security single society verification work world