The 7th Central European Conference on Cryptology
June 22-24, 2007, Smolenice, Slovakia

Abstract of a plenary talk

Group Key Establishment: Some Security Goals and Constructions

Rainer Steinwandt

Center for Cryptology and Information Security
Mathematical Sciences Dept.
Florida Atlantic University
777 Glades Rd.
Boca Raton, FL 33431

The talk discusses security requirements for group key establishment schemes. A main focus is on issues related to (password-based) authentication or malicious insiders. In particular, an example of a protocol compiler is discussed, that tries to facilitate the modular design of (password-)authenticated group key key establishment schemes: Given a (password-)authenticated two-party solution, the described construction enables the derivation of a (password-)authenticated n-party solution. The discussed compiler builds on a common reference string and adds two more rounds of communication to the two-party solution. No random oracle or ideal cipher assumption is needed.

(Based on joint work with Michel Abdalla, Jens-Matthias Bohli and María Isabel González Vasco.)

Last updated on February 12, 2007.