Paper 2012/043

A novel Group Key Transfer Protocol

Chingfang Hsu, Bing Zeng, Qi Cheng, and Guohua Cui


Group key transfer protocols depend on a mutually trusted key generation center (KGC) to transport the group key to all group members secretly. This approach requires that a trusted sever be set up, and it incurs communication overhead costs. In addition, the existing group key transfer protocols based on secret sharing all use threshold schemes that need to compute a -degree interpolating polynomial to encrypt and decrypt the secret group key, then it increases the computational complexity of system. In this paper, we first present a novel group key transfer protocol without an online KGC, which is based on DH key agreement and a perfect linear secret sharing scheme (LSSS). The confidentiality of the group key transfer phase of this protocol is information theoretically secure, which is ensured by this LSSS. Furthermore, this protocol can resist potential attacks and also reduce the overhead of system implementation. Goals and security threats of our proposed group key transfer protocol will be analyzed in detail.

Available format(s)
Cryptographic protocols
Publication info
Published elsewhere. This paper has not been published elsewhere
Contact author(s)
cherryjingfang @ gmail com
2012-01-30: received
Short URL
Creative Commons Attribution


      author = {Chingfang Hsu and Bing Zeng and Qi Cheng and Guohua Cui},
      title = {A novel Group Key Transfer Protocol},
      howpublished = {Cryptology ePrint Archive, Paper 2012/043},
      year = {2012},
      note = {\url{}},
      url = {}
Note: In order to protect the privacy of readers, does not use cookies or embedded third party content.