|Authors:||Mihaljević, Miodrag J.
Fossorier, Marc P. C.
|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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