Unconditional Unclonable Encryption
2026-07-23 • Cryptography and Security
Cryptography and Security
AI summaryⓘ
The authors present a method to securely encrypt a single bit of information such that the encryption key cannot be copied or cloned. Their scheme ensures very strong security without relying on extra assumptions, meaning it's provably safe based on information theory alone. They also made sure that the process of encrypting and decrypting is efficient, and the chance of breaking the unclonability is extremely small.
information-theoretic securityone-time encryptionprivate-key encryptionunclonable encryptionone-bit messageencryption efficiencyunclonable-indistinguishabilityquantum cryptography
Authors
Prabhanjan Ananth, Amit Sahai
Abstract
We give an unconditional construction of information-theoretically secure one-time private-key unclonable encryption scheme for one-bit messages, with efficient encryption and decryption and exponentially small unclonable-indistinguishability advantage.