Published in

Springer Verlag, Lecture Notes in Computer Science, p. 254-271

DOI: 10.1007/978-3-642-02384-2_16

Links

Tools

Export citation

Search in Google Scholar

Password-Authenticated Group Key Agreement with Adaptive Security and Contributiveness

Journal article published in 2009 by Michel Abdalla ORCID, Dario Catalano, Céline Chevalier, David Pointcheval ORCID
This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Green circle
Preprint: archiving allowed
Upload
Green circle
Postprint: archiving allowed
Upload
Red circle
Published version: archiving forbidden
Policy details
Data provided by SHERPA/RoMEO

Abstract

The original publication is available at www.springerlink.com ; International audience ; Adaptively-secure key exchange allows the establishment of secure channels even in the presence of an adversary that can corrupt parties adaptively and obtain their internal states. In this paper, we give a formal definition of contributory protocols and define an ideal functionality for password-based group key exchange with explicit authentication and contributiveness in the UC framework. As with previous definitions in the same framework, our definitions do not assume any particular distribution on passwords or independence between passwords of different parties. We also provide the first steps toward realizing this functionality in the above strong adaptive setting by analyzing an efficient existing protocol and showing that it realizes the ideal functionality in the random-oracle and ideal-cipher models based on the CDH assumption.