Using data compression and randomization to build an unconditionally secure short key cipher

Autor:	Ryabko, Boris
Rok vydání:	2021
Předmět:	Computer Science - Cryptography and Security 94A60 Cryptography
Druh dokumentu:	Working Paper
Popis:	We consider the problem of constructing an unconditionally secure cipher for the case when the key length is less than the length of the encrypted message. (Unconditional security means that a computationally unbounded adversary cannot obtain information about the encrypted message without the key.) In this article, we propose data compression and randomization techniques combined with entropically-secure encryption. The resulting cipher can be used for encryption in such a way that the key length does not depend on the entropy or the length of the encrypted message; instead, it is determined by the required security level.
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2112.10173 Zobrazit plný text záznamu View this record from Arxiv