Scalable and efficient approach for secure group communication using proxy cryptography

Youngjoo Shin, Junbeom Hur

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Multicast is a scalable solution for group communications. In order to offer security for multicast applications, a group key has to be changed whenever a member joins or leaves the group. This incurs 1-affects-n problem, which is a constraint on scalability. Decentralized approaches solve the scalability problem by dividing a group into several subgroups that use independent group keys. These approaches, however, introduce new challenges: problem of trusting third party and inefficiency of data delivery. Proxy encryption is a good approach to solve the problem of trusting third party. In this paper, we propose a novel secure multicast scheme using the proxy cryptography. The proposed scheme provides not only scalability but also data transmission efficiency by dynamic subgrouping of group members while intermediate data-relaying third parties are not required to be trusted.

Original languageEnglish
Pages (from-to)413-425
Number of pages13
JournalWireless Networks
Issue number4
Publication statusPublished - 2012 May
Externally publishedYes


  • Data transformation
  • Dynamic network
  • Group key management
  • Key transformation
  • Multicast
  • Proxy encryption

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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