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Paper 2013/704

Adaptive Witness Encryption and Asymmetric Password-based Cryptography

Mihir Bellare and Viet Tung Hoang

Abstract

This paper defines adaptive soundness (AS) security for witness encryption and applies it to provide the first non-invasive schemes for asymmetric password-based encryption (A-PBE). A-PBE offers significant gains over classical, symmetric password-based encryption (S-PBE) in the face of attacks that compromise servers to recover hashed passwords. We also show by counter-example that the original soundness security (SS) requirement of GGSW does not suffice for the security of their own applications, and show that AS fills the gap.

Metadata
Available format(s)
PDF
Category
Foundations
Publication info
Preprint. MINOR revision.
Keywords
Passwordswitness encryption
Contact author(s)
vth005 @ eng ucsd edu
History
2015-02-12: last of 3 revisions
2013-11-03: received
See all versions
Short URL
https://ia.cr/2013/704
License
Creative Commons Attribution
CC BY
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