International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Susan Hohenberger

Publications

Year
Venue
Title
2020
CRYPTO
Chosen Ciphertext Security from Injective Trapdoor Functions
Susan Hohenberger Venkata Koppula Brent Waters
We provide a construction of chosen ciphertext secure public-key encryption from (injective) trapdoor functions. Our construction is black box and assumes no special properties (e.g. ``lossy'', ``correlated product secure'') of the trapdoor function.
2018
EUROCRYPT
2017
TCC
2015
JOFC
2015
EUROCRYPT
2015
ASIACRYPT
2015
ASIACRYPT
2014
EUROCRYPT
2014
PKC
2013
PKC
2013
CRYPTO
2012
TCC
2012
EUROCRYPT
2012
PKC
2012
JOFC
Batch Verification of Short Signatures
With computer networks spreading into a variety of new environments, the need to authenticate and secure communication grows. Many of these new environments have particular requirements on the applicable cryptographic primitives. For instance, a frequent requirement is that the communication overhead inflicted be small and that many messages be processable at the same time. In this paper, we consider the suitability of public key signatures in the latter scenario. That is, we consider (1) signatures that are short and (2) cases where many signatures from (possibly) different signers on (possibly) different messages can be verified quickly. Prior work focused almost exclusively on batching signatures from the same signer.We propose the first batch verifier for messages from many (certified) signers without random oracles and with a verification time where the dominant operation is independent of the number of signatures to verify. We further propose a new signature scheme with very short signatures, for which batch verification for many signers is also highly efficient. Combining our new signatures with the best known techniques for batching certificates from the same authority, we get a fast batch verifier for certificates and messages combined. Although our new signature scheme has some restrictions, it is very efficient and still practical for some communication applications.
2011
TCC
2011
JOFC
2010
EUROCRYPT
2009
PKC
2009
EUROCRYPT
2009
CRYPTO
2008
ASIACRYPT
2007
ASIACRYPT
2007
ASIACRYPT
2007
EUROCRYPT
2007
TCC
2005
EUROCRYPT
2005
TCC

Program Committees

Crypto 2022
Eurocrypt 2020
Crypto 2019
PKC 2014
TCC 2014
Crypto 2012
Crypto 2010
TCC 2010
TCC 2008
Crypto 2008