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一种可撤销的KP-ABE方案
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A Revocable KP-ABE Scheme
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    摘要:

    提出了一个支持私钥撤销的KP-ABE(Key Policy Attribute Based Encryption)方案, 该方案以直接撤销模式对用户进行撤销, 能够在不更新系统公钥和任何一个用户的私钥的情况下完成对用户的撤销, 更新代价较小.同时该方案基于访问树实现与Attrapadung 等人基于LSSS(Linear Secret Sharing Schemes)的支持用户撤销的KP-ABE 方案相比, 构造更为简单. 该方案的安全性可以规约到标准模型下的判定性q-BDHE(q-Bilinear Diffie-Hellman Exponent)假设.

    Abstract:

    This paper proposes a Key Policy Attribute-Based Encryption (KP-ABE) scheme supporting user's private key revocation under the direct revocation model, without affecting the public key and any user's private key, so the cost of the revocation is small. Based on the access tree, the construction of our scheme is simpler than the construction proposed by Attrapadung which is based on linear Secret Sharing Schemes(LSSS). Its security can be reduced to the q-Bilinear Diffie-Hellman Exponent (q-BDHE) assumption under the standard model.

    参考文献
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胡海英,商威.一种可撤销的KP-ABE方案.计算机系统应用,2013,22(9):123-128

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  • 收稿日期:2013-02-04
  • 最后修改日期:2013-03-18
  • 在线发布日期: 2013-10-10
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