2nd International ICST Conference on Scalable Information Systems

Research Article

A Broadcast-Encryption-Based Key Management Scheme for Dynamic Multicast Communications

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  • @INPROCEEDINGS{10.4108/infoscale.2007.958,
        author={Chin-Chen Chang and Yu-Wei Su and Iuon-Chang Lin},
        title={A Broadcast-Encryption-Based Key Management Scheme for Dynamic Multicast Communications},
        proceedings={2nd International ICST Conference on Scalable Information Systems},
        proceedings_a={INFOSCALE},
        year={2010},
        month={5},
        keywords={Multicast key management broadcast encryption},
        doi={10.4108/infoscale.2007.958}
    }
    
  • Chin-Chen Chang
    Yu-Wei Su
    Iuon-Chang Lin
    Year: 2010
    A Broadcast-Encryption-Based Key Management Scheme for Dynamic Multicast Communications
    INFOSCALE
    ICST
    DOI: 10.4108/infoscale.2007.958
Chin-Chen Chang1,*, Yu-Wei Su2,*, Iuon-Chang Lin3,*
  • 1: Department of Information Engineering and Computer Science Feng Chia University 100 Wenhwa Rd., Seatwen, Taichung 40724, Taiwan, R.O.C. 886-4-24517250-3790
  • 2: Department of Computer Science and Information Engineering National Chung Cheng University 168 University Rd., Min-Hsiung, Chia-Yi 621, Taiwan, R.O.C. 886-4-24517250-3790
  • 3: Department of Management Information Systems National Chung Hsing University 250 Kuo-Kuang Rd., Taichung, 402, Taiwan, R.O.C. 886-4-22840864-609
*Contact email: ccc@cs.ccu.edu.tw, syw@itri.org.tw, iclin@nchu.edu.tw

Abstract

Broadcast encryption is an efficient and secure method to allow a user to be able to communicate securely with multiple receivers in an insecure broadcast environment. Previously, scholars usually applied tree structures to design multicast key management schemes, in which the distributed key was used to encrypt the transmitted message. However, in order to achieve forward secrecy and backward secrecy, previous tree-structure-based approaches had to conduct the rekeying process when a member joined or left a multicast group. However, the rekeying process usually requires that other members change their cryptographic keys. Consequently, this proved to be inconvenient and impractical. In this paper, we propose an efficient multicast key management scheme to solve this problem. Compared with previous tree-structure-based multicast key management schemes, the benefits of our scheme include eliminating the rekeying process and reducing the required key storage for each member.