标准模型下一种新的基于身份的分级加密方案
doi: 10.3724/SP.J.1146.2007.01868
A New Hierarchical Identity-Based Encryption in the Standard Model
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摘要: 该文给出了一种新的基于身份的分级加密方案，在标准模型下，证明了该方案是推广selective-ID安全的。在判定BDHI假设下，该方案可以抗选择明文攻击(CPA)。另外，作为文中方案的推广应用，基于Waters方案及其变形方案，提出了一种标准模型下基于身份的分级签名方案。在DHI假设下，该方案被证明对适应性选择消息攻击是存在性不可伪造的。Abstract: In this paper, a new Hierarchical Identity-Based Encryption(HIBE) scheme is proposed and is provable security in the generalized selective-ID model in the standard model. Under the decision Bilinear Diffie-Hellman Inversion (BDHI) assumption, this new scheme is provable security against Chosen Plaintext Attacks(CPA). Additionally, a Hierarchical Identity-Based Signature (HIBS) scheme is proposed based on the Waterss scheme and our technique in the standard model. And under Diffie-Hellman Inversion(DHI) assumption, it is provable security against existentially unforgeable under an adaptive chosen message attack.
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