A novel Group Key Transfer Protocol

Chingfang Hsu; Bing Zeng; Qi Cheng; Guohua Cui

Paper 2012/043

A novel Group Key Transfer Protocol

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

Abstract

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.

Metadata

Available format(s): PDF
Category: Cryptographic protocols
Publication info: Published elsewhere. This paper has not been published elsewhere
Contact author(s): cherryjingfang @ gmail com
History: 2012-01-30: received
Short URL: https://ia.cr/2012/043
License: CC BY

BibTeX

@misc{cryptoeprint:2012/043,
      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},
      url = {https://eprint.iacr.org/2012/043}
}