Publication

Lattice-Based Blind Signatures: Short, Efficient, and Round-Optimal

Publications associées (32)

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Signatures for Multisource Network Coding

László Czap

We consider the problem of securing inter-ﬂow network coding with multiple sources. We present a practical homomorphic signature scheme that makes possible to verify network coded packets composed of data originating from diﬀerent sources. The multi-source ...

ArXiv2010

Secure communication using authenticated channels

Sylvain Pasini

Our main motivation is to design more user-friendly security protocols. Indeed, if the use of the protocol is tedious, most users will not behave correctly and, consequently, security issues occur. An example is the actual behavior of a user in front of an ...

EPFL2009

Passive-Only Key Recovery Attacks on RC4

Serge Vaudenay, Martin Vuagnoux

We present several weaknesses in the key scheduling algorithm of RC4 when the secret key contains an initialization vector - a cryptographic scheme typically used by the WEP and WPA protocols to protect IEEE 802.11 wireless communications. First, we show h ...

Springer2007

Cryptosystems and LLL

Thomas Baignères

Since the late 70’s, several public key cryptographic algorithms have been proposed. Diﬃe and Hellman ﬁrst came with this concept in 1976. Since that time, several other public key cryptosystems were invented, such as the well known RSA, ElGamal or Rabin c ...

2006

Short undeniable signatures

Jean Monnerat

Digital signatures are one of the main achievements of public-key cryptography and constitute a fundamental tool to ensure data authentication. Although their universal verifiability has the advantage to facilitate their verification by the recipient, this ...

EPFL2006

Fraud within Asymmetric Multi-Hop Cellular Networks

Gildas Avoine

At Financial Cryptography 2003, Jakobsson, Hubaux, and Buttyan suggested a lightweight micro-payment scheme aimed at encouraging routing collaboration in asymmetric multi-hop cellular networks. We will show in this paper that this scheme suffers from some ...

2005

Key improvements to XTR

Arjen Lenstra

This paper describes improved methods for XTR key representation and parameter generation (Lenstra et al., 2000). If the field characteristic is properly chosen, the size of the XTR public key for signature applications can be reduced by a factor of three ...

2000

Chinese remaindering based cryptosystems in the presence of faults

Arjen Lenstra

We present some observations on public key cryptosystems that use the Chinese remaindering algorithm. Our results imply that careless implementations of such systems could be vulnerable. Only one faulty signature, in some explained context, is enough to re ...

Springer Verlag1999

State of the art in electronic payment systems

Philippe Janson

The exchange of goods conducted face-to-face between two parties dates back to before the beginning of recorded history. Traditional means of payment have always had security problems, but now electronic payments retain the same drawbacks and add some risk ...

1997

Generating standard DSA signatures without long inversion

Arjen Lenstra

We show how the generation of a random integer k modulo q and the subsequent computation of k-1 mod q during the signature phase of the NIST digital signature algorithm (DSA) can be replaced by the simultaneous generation of a pair (k,k-1

1996