Attribute-Based Key-Insulated Encryption

Attribute-Based Key-Insulated Encryption
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基于属性的密钥隔离加密

DOI:
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发表时间:
2011
影响因子:
1.1
通讯作者:
Ke-Fei Chen
Ke-Fei Chen
中科院分区:
计算机科学4区
文献类型:
--
作者:
Jian-Hong Chen;Yong-Tao Wang;Ke-Fei Chen

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基于属性的加密(ABE)是公钥加密的一种令人兴奋的替代方案,因为ABE开发了具有高表现力的加密系统,而不需要公钥基础设施(PKI)来公开身份(属性集)、公钥和后者的有效性之间的映射。任何设置,无论是基于PKI的还是基于属性的,都必须提供一种从系统中撤销用户的方法。为了缓解ABE在撤销方面的局限性,我们提出了一种基于属性的密钥隔离加密(ABKIE)方案,这是一个新的ABE方案。在我们的ABKIE方案中,私钥可以在不更改其公钥(一组属性)的情况下续订。该方案对自适应选择密文攻击是安全的。在假设决策双线性Diffie-Hellman问题计算困难的情况下,给出了在没有随机预言的选择ID安全模型下的形式安全性证明。据我们所知,这是迄今为止第一个ABKIE方案。此外,这也是安倍关于撤销的第一个具体建设。
Attribute-based encryption (ABE) is an exciting alternative to public-key encryption, as ABE develops encryption systems with high expressiveness, without the need for a public key infrastructure (PKI) that makes publicly available the mapping between identities (sets of attributes), public keys, and validity of the latter. Any setting, PKI or attribute-based, must provide a means to revoke users from the system. To mitigate the limitation of ABE with regard to revocation, we propose an attribute-based key-insulated encryption (ABKIE) scheme, which is a novel ABE scheme. In our ABKIE scheme, a private key can be renewed without having to make changes to its public key (a set of attributes). The scheme is secure against adaptive chosen ciphertext attacks. The formal proof of security is presented under the Selective-ID security model, i.e. without random oracles, assuming the decision Bilinear Diffie-Hellman problem is computationally hard. To the best of our knowledge, this is the first ABKIE scheme up to now. Further, this is also the first concrete ABE construction with regard to revocation.
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