Adaptively secure broadcast encryption under standard assumptions with better efficiency
- Authors
- Lee, Kwangsu; Lee, Dong Hoon
- Issue Date
- 5월-2015
- Publisher
- INST ENGINEERING TECHNOLOGY-IET
- Citation
- IET INFORMATION SECURITY, v.9, no.3, pp.149 - 157
- Indexed
- SCIE
SCOPUS
- Journal Title
- IET INFORMATION SECURITY
- Volume
- 9
- Number
- 3
- Start Page
- 149
- End Page
- 157
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/93625
- DOI
- 10.1049/iet-ifs.2014.0102
- ISSN
- 1751-8709
- Abstract
- In this study, the authors present an efficient public-key broadcast encryption (PKBE) scheme with sub-linear size of public keys, private keys and ciphertexts and prove its adaptive security under standard assumptions. Compared with the currently best scheme of Garg et al. (CCS 2010) that provides adaptive security under standard assumptions and sub-linear size of various parameters, the ciphertext size of the author's scheme is 94% shorter and the encryption algorithm of their scheme is also 2.8 times faster than the scheme of Garg et al. To achieve their scheme, they adapt the dual system encryption technique of Waters. However, there is a challenging problem to use this technique for the construction of PKBE with sub-linear size of ciphertexts such as a tag compression problem. To overcome this problem, they first devise a novel tag update technique for broadcast encryption. Using this technique, they build an efficient PKBE scheme in symmetric bilinear groups, and prove its adaptive security under standard assumptions.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - School of Cyber Security > Department of Information Security > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.