Paper 2008/304
A New Randomness Extraction Paradigm for Hybrid Encryption
Eike Kiltz, Krzysztof Pietrzak, Martijn Stam, and Moti Yung
Abstract
We present a new approach to the design of IND-CCA2 secure hybrid encryption schemes in the standard model. Our approach provides an efficient generic transformation from 1-universal to 2-universal hash proof systems. The transformation involves a randomness extractor based on a 4-wise independent hash function as the key derivation function. Our methodology can be instantiated with efficient schemes based on standard intractability assumptions such as DDH, QR and Paillier. Interestingly, our framework also allows to prove IND-CCA2 security of a hybrid version of 1991's Damgaard's ElGamal public-key encryption scheme under the DDH assumption.
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. This is the full version of the paper in EUROCRYPT 2009
- Keywords
- Chosen-ciphertext securityhybrid encryptionhash proof systemsElGamal
- Contact author(s)
- kiltz @ cwi nl
- History
- 2009-07-22: last of 2 revisions
- 2008-07-08: received
- See all versions
- Short URL
- https://ia.cr/2008/304
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2008/304,
author = {Eike Kiltz and Krzysztof Pietrzak and Martijn Stam and Moti Yung},
title = {A New Randomness Extraction Paradigm for Hybrid Encryption},
howpublished = {Cryptology {ePrint} Archive, Paper 2008/304},
year = {2008},
url = {https://eprint.iacr.org/2008/304}
}
