| Wang Yongtao (王永涛),Chen Kefei,Long Yu.[J].高技术通讯(英文),2013,19(1):82~87 |
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| Towards accountable authority attribute-based encryption |
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| DOI： |
| 中文关键词: |
| 英文关键词: cryptography, attribute-based encryption, accountable authority, key escrow, traceability |
| 基金项目: |
| Author Name | Affiliation | | Wang Yongtao (王永涛) | | | Chen Kefei | | | Long Yu | |
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| 中文摘要: |
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| 英文摘要: |
| An accountable authority attribute-based encryption (A-ABE) scheme is presented in this paper. The notion of accountable authority identity-based encryption (A-IBE) was first introduced by Goyal at Crypto’07. It is a novel approach to mitigate the (inherent) key escrow problem in identity-based cryptosystems. In this work, the concept of accountable authority to attribute-based encryption (ABE) setting is generalized for the first time, and then a construction is given. The scheme non-trivially integrates an A-IBE scheme proposed by Libert et al. with an ABE scheme. In our construction, a user will be identified by a pair (id, ω), where id denotes the user’s identity and ω denotes the set of attributes associated to the user. In addition, our construction is shown to be secure under some reasonable assumptions. |
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