Paper 2017/838
Two-Round PAKE from Approximate SPH and Instantiations from Lattices
Jiang Zhang and Yu Yu
Abstract
Password-based authenticated key exchange (PAKE) enables two users with shared low-entropy passwords to establish cryptographically strong session keys over insecure networks. At Asiacrypt 2009, Katz and Vaikuntanathan showed a generic three-round PAKE based on any CCA-secure PKE with associated approximate smooth projective hashing (ASPH), which helps to obtain the first PAKE from lattices. In this paper, we give a framework for constructing PAKE from CCA-secure PKE with associated ASPH, which uses only two-round messages by carefully exploiting a splittable property of the underlying PKE and its associated non-adaptive ASPH. We also give a splittable PKE with associated non-adaptive ASPH based on the LWE assumption, which finally allows to instantiate our two-round PAKE framework from lattices.
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- A major revision of an IACR publication in ASIACRYPT 2017
- Contact author(s)
- jiangzhang09 @ gmail com
- History
- 2017-09-01: received
- Short URL
- https://ia.cr/2017/838
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2017/838,
author = {Jiang Zhang and Yu Yu},
title = {Two-Round {PAKE} from Approximate {SPH} and Instantiations from Lattices},
howpublished = {Cryptology {ePrint} Archive, Paper 2017/838},
year = {2017},
url = {https://eprint.iacr.org/2017/838}
}
