Scalable group key management with partially trusted controllers

Himanshu Khurana, Rafael Bonilla, Adam Slagell, Raja Afandi, Hyung Seok Hahm, Jim Basney

Research output: Contribution to journalConference article


Scalable group key management solutions are crucial for supporting Internet applications that are based on a group communication model. Many solutions have been proposed and of these the most efficient and scalable ones are based on logical key hierarchies (LKH) with symmetric keys organized in a tree. However, these solutions centralize trust in the group controller and make it an attractive attack target for access to communication keys for all groups supported by the controller. In this paper we propose a novel group key management approach, which uses a partially trusted controller that does not have access to communication keys and yet provides the same level of efficiency and scalability as LKH schemes. For this we develop a new public-key encryption scheme, which is based on El Gamal, and we show that the scheme is as secure as El Gamal.

Original languageEnglish (US)
Pages (from-to)662-672
Number of pages11
JournalLecture Notes in Computer Science
Issue numberII
StatePublished - Oct 24 2005
EventNetworking - ICN 2005 - Reunion Island, France
Duration: Apr 17 2005Apr 21 2005


ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

Cite this

Khurana, H., Bonilla, R., Slagell, A., Afandi, R., Hahm, H. S., & Basney, J. (2005). Scalable group key management with partially trusted controllers. Lecture Notes in Computer Science, 3421(II), 662-672.