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Quantum-secure message authentication via blind-unforgeability. (arXiv:1803.03761v4 [quant-ph] UPDATED)
cs.CR updates on arXiv.org arxiv.org
Formulating and designing authentication of classical messages in the
presence of adversaries with quantum query access has been a longstanding
challenge, as the familiar classical notions of unforgeability do not directly
translate into meaningful notions in the quantum setting. A particular
difficulty is how to fairly capture the notion of "predicting an unqueried
value" when the adversary can query in quantum superposition.
We propose a natural definition of unforgeability against quantum adversaries
called blind unforgeability. This notion defines a function …
access adversaries adversary authentication called capture challenge definition function meaningful message messages quantum query translate value