Broadcast encryption with dealership

Authors

Clementine Gritti, University of WollongongFollow
Willy Susilo, University of WollongongFollow
Thomas Plantard, University of WollongongFollow
Kaitai Lang, Aalto University
Duncan S. Wong, City University of Hong KongFollow

RIS ID

99496

Publication Details

Gritti, C., Susilo, W., Plantard, T., Lang, K. & Wong, D. S. (2016). Broadcast encryption with dealership. International Journal of Information Security, 15 (3), 271-283.

Abstract

In this paper, we introduce a new cryptographic primitive called broadcast encryption with dealership. This notion, which has never been discussed in the cryptography literature, is applicable to many realistic broadcast services, for example subscription-based television service. Specifically, the new primitive enables a dealer to bulk buy the access to some products (e.g., TV channels) from the broadcaster, and hence, it will enable the dealer to resell the contents to the subscribers with a cheaper rate. Therefore, this creates business opportunity model for the dealer. We highlight the security consideration in such a scenario and capture the security requirements in the security model. Subsequently, we present a concrete scheme, which is proven secure under the decisional bilinear Diffie-Hellman exponent and the Diffie-Hellman exponent assumptions.