Anonymous Identity Based Encryption with Plaintext Awareness in the Two Identities Setting
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概要
- 論文の詳細を見る
An anonymous identity based encryption (anonymous IBE) scheme requires that an adversary can not determine the identity of the recipient from a ciphertext encrypted by the corresponding public key. The anonymity was formalized in previous works [1], [13], and this can be considered under chosen plaintext attack and adaptive chosen ciphertext attack, yielding two notions of security, ID-II-CPA and ID-II-CCA, where II denotes “indistinguishability of identities.” However, how to obtain an ID-II-CCA secure anonymous IBE in the random oracle model is still a challenging problem. We firstly propose a new notion of plaintext awareness in the two identities setting, called PATI. Secondly, we prove that the IBE scheme is ID-II-CCA secure if it is PATI secure. Finally, we propose the first generic conversion for anonymous IBE from ID-II-CPA to ID-II-CCA in the random oracle model.
- （社）電子情報通信学会の論文
- 2008-12-01
著者
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Li Yong
Key Laboratory Of Agro-ecological Processes In Subtropical Region Institute Of Subtropical Agricultu
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Li Yong
Key Laboratory Of Communication & Information Systems (beijing Jiaotong University) Beijing Muni
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LIN Changlu
State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences
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ZHANG Qiupu
State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences
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YE Dingfeng
State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences
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Zhang Qiupu
State Key Laboratory Of Information Security Graduate University Of Chinese Academy Of Sciences
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Ye Dingfeng
State Key Laboratory Of Information Security Graduate University Of Chinese Academy Of Sciences
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Lin Changlu
State Key Laboratory Of Information Security Graduate University Of Chinese Academy Of Sciences
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