@inproceedings{ae374401e44d4706a7fe1b092194fcbb,
title = "Hybrid damg{\aa}rd is CCA1-secure under the DDH assumption",
abstract = "In 1991, Damg{\aa}rd proposed a simple public-key cryptosystem that he proved CCA1-secure under the Diffie-Hellman Knowledge assumption. Only in 2006, Gj{\o}steen proved its CCA1-security under a more standard but still new and strong assumption. The known CCA2-secure public-key cryptosystems are considerably more complicated. We propose a hybrid variant of Damg{\aa}rd's public-key cryptosystem and show that it is CCA1-secure if the used symmetric cryptosystem is CPA-secure, the used MAC is unforgeable, the used key-derivation function is secure, and the underlying group is a DDH group. The new cryptosystem is the most efficient known CCA1-secure hybrid cryptosystem based on standard assumptions.",
keywords = "CCA1-security, DDH, Damg{\aa}rd's cryptosystem, Hybrid cryptosystems",
author = "Yvo Desmedt and Helger Lipmaa and Phan, \{Duong Hieu\}",
year = "2008",
month = dec,
day = "1",
doi = "10.1007/978-3-540-89641-8\_2",
language = "English",
isbn = "3540896406",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
pages = "18--30",
booktitle = "Cryptology and Network Security - 7th International Conference, CANS 2008, Proceedings",
note = "7th International Conference on Cryptology and Network Security, CANS 2008 ; Conference date: 02-12-2008 Through 04-12-2008",
}