Authors: Mihaljević, Miodrag J. 
Fossorier, Marc P. C.
Imai, Hideki
Affiliations: Mathematical Institute of the Serbian Academy of Sciences and Arts 
Title: A novel broadcast encryption based on time-bound cryptographic keys
Journal: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume: 3919 LNCS
First page: 258
Last page: 276
Conference: International Conference on Digital Rights Management, DRMTICS 2005 : Digital Rights Management. Technologies, Issues, Challenges and Systems; Sydney, Australia; October 31 - November 2, 2005
Issue Date: 1-Jan-2006
Rank: M23
ISBN: 978-3-540-35999-9
ISSN: 0302-9743
DOI: 10.1007/11787952_20
Abstract: 
This paper proposes a novel broadcast encryption (BE) approach which combines the traditional one and time-bound cryptographic keys. The developed BE provides heavy reduced cumulative communication overhead and yields increased security. The reduction of the communication overhead is achieved via employment of time-bound session encrypting keys (TB-SEKs). The increased security against ciphertext only attack appears as a consequence of the reduced communication overhead and the increased security against the chosen-plaintext attack is obtained via employment of the time-bound key-encrypting keys (TB-KEKs). Appropriate methods for management of TB-SEKs and TB-KEKs are given. The proposed scheme is compared with traditional BE schemes and the advantages as well as the related trade-offs are pointed out.
Keywords: Broadcast encryption | Cryptographic keys management | One-way mappings | Pseudorandom number generators | Time-bound keys | Time-limited services
Publisher: Springer Link

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