Author

Vipul Goyal

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Preprint Aug 2026

Decisional Monogamy-of-Entanglement for Coset States and Applications to Unclonable Cryptography with Correlated Challenges

A main application of quantum information in cryptography is copy-protection, where we encode a functionality (such as a decryption key or software) into a reusable quantum state so that it cannot be split into two adversaries (called freeloaders) that both remain useful. Previous works have only shown security for ind...

Amit Behera, Alper Çakan, Vipul Goyal · 0 citations

Preprint Sep 2026

Breaking the Bounded Entanglement Barrier for Quantum Position Verification

Position verification, introduced by Chandran et al. (SIAM J. Computing 2014), allows verifiers to test a prover's claimed position by an interactive protocol. Classical position verification is impossible. Even for Quantum Position Verification (QPV), there always exists an LOCC (Local Operations and Classical Communi...

Amit Behera, Vipul Goyal · 0 citations

Preprint Aug 2026

Copy-Protection with Correlated Challenges: Point Functions and More via Decisional Coset Monogamy

Copy-protection encodes a functionality in a reusable quantum state that cannot be split into two states (freeloader adversaries) which remain simultaneously useful. Prior plain-model results handle only independently sampled challenges; the more natural identical-challenge notion, also tied to unclonable bits and copy...

Amit Behera, Alper Çakan, Vipul Goyal · 0 citations