Potentially Information-theoretic Secure Y00 Quantum Stream Cipher with Limited Key Lengths beyond One-Time Pad

Autor:	Iwakoshi, Takehisa
Rok vydání:	2019
Předmět:	Computer Science - Cryptography and Security Quantum Physics
Druh dokumentu:	Working Paper
Popis:	The previous work showed that the Y00 protocol could stay secure with the eavesdropper's guessing probability on the secret keys being strictly less than one under an unlimitedly long known-plaintext attack with quantum memory. However, an assumption that at least a fast correlation attack is completely disabled by irregular mapping. The present study shows that the Y00 protocol can be information-theoretic secure under any quantum-computational crypto-analyses if the Y00 system is well designed. The Y00 protocol directly encrypts messages with short secret keys expanded into pseudo-random running keys unlike One-Time Pad. However, it may offer information-theoretic security beyond the Shannon limit of cryptography. Comment: Comments are appreciated
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1902.05192 Zobrazit plný text záznamu View this record from Arxiv