International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Rosario Gennaro

Publications

Year
Venue
Title
2018
CRYPTO
Threshold Cryptosystems from Threshold Fully Homomorphic Encryption 📺
We develop a general approach to adding a threshold functionality to a large class of (non-threshold) cryptographic schemes. A threshold functionality enables a secret key to be split into a number of shares, so that only a threshold of parties can use the key, without reconstructing the key. We begin by constructing a threshold fully-homomorphic encryption scheme (ThFHE) from the learning with errors (LWE) problem. We next introduce a new concept, called a universal thresholdizer, from which many threshold systems are possible. We show how to construct a universal thresholdizer from our ThFHE. A universal thresholdizer can be used to add threshold functionality to many systems, such as CCA-secure public-key encryption (PKE), signature schemes, pseudorandom functions, and others primitives. In particular, by applying this paradigm to a (non-threshold) lattice signature system, we obtain the first single-round threshold signature scheme from LWE.
2018
TCC
Fine-Grained Secure Computation
Matteo Campanelli Rosario Gennaro
This paper initiates a study of Fine Grained Secure Computation: i.e. the construction of secure computation primitives against “moderately complex” adversaries. We present definitions and constructions for compact Fully Homomorphic Encryption and Verifiable Computation secure against (non-uniform) $$\mathsf {NC}^1$$ adversaries. Our results do not require the existence of one-way functions and hold under a widely believed separation assumption, namely $$\mathsf {NC}^{1}\subsetneq \oplus \mathsf {L}/ {\mathsf {poly}}$$ . We also present two application scenarios for our model: (i) hardware chips that prove their own correctness, and (ii) protocols against rational adversaries potentially relevant to the Verifier’s Dilemma in smart-contracts transactions such as Ethereum.
2016
JOFC
2014
PKC
2013
TCC
2013
CRYPTO
2013
ASIACRYPT
2013
EUROCRYPT
2012
TCC
2012
ASIACRYPT
2011
CRYPTO
2011
PKC
2010
PKC
2010
PKC
2010
JOFC
2010
CRYPTO
2009
JOFC
2008
TCC
2008
JOFC
2008
PKC
2008
EUROCRYPT
2007
PKC
2007
JOFC
2007
JOFC
2007
JOFC
2005
EUROCRYPT
2005
PKC
2005
JOFC
2004
ASIACRYPT
2004
CRYPTO
2004
CRYPTO
2004
EUROCRYPT
2004
TCC
2003
EUROCRYPT
2003
EUROCRYPT
2002
CRYPTO
2002
EUROCRYPT
2002
JOFC
2002
JOFC
2001
CHES
2001
EUROCRYPT
2000
CRYPTO
2000
EUROCRYPT
2000
JOFC
2000
JOFC
1999
CRYPTO
1999
EUROCRYPT
1999
EUROCRYPT
1998
CRYPTO
1998
EUROCRYPT
1997
CRYPTO
1997
CRYPTO
1997
EUROCRYPT
1996
CRYPTO
1996
EUROCRYPT
1995
EUROCRYPT

Program Committees

Crypto 2022
Crypto 2021
Crypto 2019
Crypto 2015 (Program chair)
Crypto 2014 (Program chair)
Asiacrypt 2013
TCC 2013
PKC 2013
Eurocrypt 2013
PKC 2012
PKC 2011 (Program chair)
Eurocrypt 2010
PKC 2009
PKC 2008
Crypto 2007
PKC 2006
TCC 2005
Eurocrypt 2004
Eurocrypt 2002
Asiacrypt 2001
Crypto 1999