A distributed key assignment protocol for secure multicast based on proxy cryptography

Chun-Ying Huang*, Yun Peng Chiu, Kuan Ta Chen, Chin Laung Lei

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A secure multicast- framework should only allow authorized members of a group to decrypt received messages; usually one "group key" is shared by all approved members. However, this raises the problem of "one affects all," whereby the actions of one member affect the whole group. Many researchers solve the problem by dividing a group into several subgroups, but most existing solutions require a centralized trusted controller to coordinate cryptographic keys for subgroups. We believe this is a constraint on network scalability. In this paper, we propose a novel framework to solve key management problems in multicast networks. Our contribution is three-fold: 1) We exploit the ElGarnal cryptosystem and propose the idea of key composition; 2) A distributed key assignment protocol is proposed to eliminate the need for a centralized trust controller in a secure multicast network that leverages proxy cryptography; and 3) We adopt a hybrid encryption technique that makes our framework more efficient and practical. Comparison with similar frameworks shows the proposed scheme is efficient in both time and space complexity. In addition, costs of most protocol operations are bounded by constants regardless of a group's size and the degree of transit nodes.

Original languageEnglish
Title of host publicationProceedings of the 2006 ACM Symposium on Information, Computer and Communications Security, ASIACCS '06
Number of pages1
DOIs
StatePublished - 1 Dec 2006
Event2006 ACM Symposium on Information, Computer and Communications Security, ASIACCS '06 - Taipei, Taiwan
Duration: 21 Mar 200724 Mar 2007

Publication series

NameProceedings of the 2006 ACM Symposium on Information, Computer and Communications Security, ASIACCS '06
Volume2006

Conference

Conference2006 ACM Symposium on Information, Computer and Communications Security, ASIACCS '06
CountryTaiwan
CityTaipei
Period21/03/0724/03/07

Keywords

  • ElGamal cryptosystem
  • Koy composition
  • Proxy cryptography
  • Secure multicast

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    Huang, C-Y., Chiu, Y. P., Chen, K. T., & Lei, C. L. (2006). A distributed key assignment protocol for secure multicast based on proxy cryptography. In Proceedings of the 2006 ACM Symposium on Information, Computer and Communications Security, ASIACCS '06 (Proceedings of the 2006 ACM Symposium on Information, Computer and Communications Security, ASIACCS '06; Vol. 2006). https://doi.org/10.1145/1128817.1128875