Author

Alper Çakan

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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 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