Broadcast encryption with dealership

Clémentine Gritti, Willy Susilo, Thomas Plantard, Kaitai Liang, Duncan S. Wong

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)271-283
Number of pages13
JournalInternational Journal of Information Security
Issue number3
Publication statusPublished - 1 Jan 2016
Externally publishedYes


  • Broadcast encryption
  • Dealership
  • Provable security


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