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A monogamy-of-entanglement game for subspace coset states. (arXiv:2107.13324v5 [cs.CR] UPDATED)
Aug. 4, 2022, 1:20 a.m. | Eric Culf, Thomas Vidick
cs.CR updates on arXiv.org arxiv.org
We establish a strong monogamy-of-entanglement property for subspace coset
states, which are uniform superpositions of vectors in a linear subspace of
$\mathbb{F}_2^n$ to which has been applied a quantum one-time pad. This
property was conjectured recently by [Coladangelo, Liu, Liu, and Zhandry,
Crypto'21] and shown to have applications to unclonable decryption and
copy-protection of pseudorandom functions. We present two proofs, one which
directly follows the method of the original paper and the other which uses an
observation from [Vidick and …
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