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Improving Privacy-Preserving CP-ABE with Hidden Access Policy

机译:通过隐藏访问策略改善隐私保护CP-ABE

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User's privacy-preserving has become an urgent problem with the rapid development of cloud technologies. Anonymous ciphertext-policy Attribute Based Encryption (CP-ABE) not only protects the security of data, but also ensures that the privacy of the data user is not compromised. However, most of the known schemes have some shortcomings where those schemes either cannot achieve compact security or are inefficient in Encryption and Decryption. Additionally, recent works show the reality of the anonymity in some proposed schemes is doubtful. To address the problems above, we use the double exponent technique to construct an anonymous CP-ABE scheme which is more compact than the results at present. The proposed scheme with hidden access policy works in prime order groups. Meanwhile, we prove the security of our scheme under the decisional n-BDHE and decisional linear assumption.
机译:随着云技术的快速发展,保护用户隐私已成为迫在眉睫的问题。基于匿名密文策略的基于属性的加密(CP-ABE)不仅可以保护数据的安全性,还可以确保不损害数据用户的隐私。但是,大多数已知方案都有一些缺点,这些方案要么不能实现紧凑的安全性,要么在加密和解密方面效率低下。此外,最近的工作表明,在某些提议的方案中匿名性的现实令人怀疑。为了解决上述问题,我们使用双指数技术构造了一个匿名的CP-ABE方案,该方案比目前的结果更为紧凑。带有隐藏访问策略的建议方案适用于主要订单组。同时,我们在决策n-BDHE和决策线性假设下证明了该方案的安全性。

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