Broadcast encryption with dealership

Journal article (2016)

Authors

Clémentine Gritti University of Wollongong
Willy Susilo University of Wollongong
Thomas Plantard University of Wollongong
K. Liang Aalto University
Duncan S. Wong City University of Hong Kong
Affiliation
External organisation
Broadcast encryption Dealership Provable security
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Published Date

01-01-2016

Language

English

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Affiliation

External organisation

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.