One-out-of-Many Unclonable Cryptography: Definitions, Constructions, and More

ePrint Report: One-out-of-Many Unclonable Cryptography: Definitions, Constructions, and More

Fuyuki Kitagawa, Ryo Nishimaki

The no-cloning principle of quantum mechanics enables us to achieve amazing unclonable cryptographic primitives, which is impossible in classical cryptography. However, the security definitions for unclonable cryptography are tricky. Achieving desirable security notions for unclonability is a challenging task. In particular, there is no indistinguishable-secure unclonable encryption and quantum copy-protection for single-bit output point functions in the standard model. To tackle this problem, we introduce and study …

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