Concept

Certificat électronique

Publications associées (125)

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DICTATE: DIstributed CerTification Authority with probabilisTic frEshness for Ad Hoc Networks

Jean-Pierre Hubaux, Jun Luo, Patrick Eugster

Securing ad hoc networks is notoriously challenging, notably due to the lack of an on-line infrastructure. In particular, key management is a problem that has been addressed by many researchers but with limited results. In this paper, we consider the case ...

2004

Location verification and key management in wireless networks

Srdan Capkun

This thesis is primarily concerned with two security mechanisms for wireless networks: location verification and key management. These mechanisms are potential building blocks in the security architectures of a range of applications. Under location verific ...

EPFL2004

Digital Signature Schemes with Domain Parameters

Serge Vaudenay

Digital signature schemes often use domain parameters such as prime numbers or elliptic curves. They can be subject to security threats when they are not treated like public keys. In this paper we formalize the notion of "signature scheme with domain param ...

2004

Key agreement over a radio link

Jean-Pierre Hubaux, Mario Cagalj

We present a simple, and yet powerful, technique for key establishment over a radio link in peer-to-peer networks. Our approach is based on the Diffie-Hellman key agreement protocol. This protocol is known to be vulnerable to the ``man-in-the-middle" attac ...

2004

Efficient, self-contained handling of identity in Peer-to-Peer systems

Karl Aberer, Manfred Hauswirth, Anwitaman Datta

Identification is an essential building block for many services in distributed information systems. The quality and purpose of identification may differ, but the basic underlying problem is always to bind a set of attributes to an identifier in a unique an ...

2004

Self-organized public-key management for mobile ad hoc networks

Jean-Pierre Hubaux, Levente Buttyan, Srdan Capkun

In contrast with conventional networks, mobile ad hoc networks usually do not provide on-line access to trusted authorities or to centralized servers and they exhibit frequent partitioning due to link and node failures and to node mobility. For these reaso ...

2003

Password interception in a SSL/TLS channel

Serge Vaudenay, Martin Vuagnoux

Simple password authentication is often used e.g. from an e-mail software application to a remote IMAP server. This is frequently done in a protected peer-to-peer tunnel, e.g. by SSL/TLS. At Eurocrypt'02, Vaudenay (2002) presented vulnerabilities in paddin ...

2003

The Security of DSA and ECDSA

Serge Vaudenay

DSA and ECDSA are well established standards for digital signature based on the discrete logarithm problem. In this paper we survey known properties, certification issues regarding the public parameters, and security proofs. ECDSA also includes a standard ...

2003

Self-Organized Public-Key Management for Mobile Ad Hoc Networks

Jean-Pierre Hubaux, Levente Buttyan, Srdan Capkun

In contrast with conventional networks, mobile ad hoc networks do not provide on-line access to trusted authorities or to centralized servers. For this reason, key management is particularly difficult to implement in such networks. The solutions published ...

2002

High performance VLSI architectures implementing strong cryptographic primitives

Feth Allah Cherigui

The main topic of this thesis is related to the state of the art in designing cryptographic primitives from a hardware point of view. A special emphasis is dedicated to low-power/low-energy CMOS design. A set of solutions is proposed including an LFSR base ...

EPFL2002