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Anonymous Attribute-Based Conditional Proxy Re-encryption

  • Xianping Mao
  • Xuefeng Li
  • Xiaochuan Wu
  • Chuansheng Wang
  • Junzuo LaiEmail author
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11058)

Abstract

Attribute-based conditional proxy re-encryption (AB-CPRE) enables ciphertext owners to carry out fine-grained decryption delegation control. In AB-CPRE schemes, we observe that the attributes associated with ciphertexts are explicitly stored along with the ciphertexts. This property is not appropriate for certain applications where attributes contain sensitive information.

We consider a new requirement for AB-CPRE: anonymity. Specifically, anonymity guarantees that no one, except users with corresponding secret keys, can gain any knowledge about the attributes related to a ciphertext. We give the formal model of anonymous AB-CPRE and propose a concrete construction. We prove that our proposed scheme is both secure and anonymous, without relying on random oracles.

Keywords

Proxy re-encryption Attribute-based encryption Anonymity 

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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  • Xianping Mao
    • 1
  • Xuefeng Li
    • 1
  • Xiaochuan Wu
    • 1
  • Chuansheng Wang
    • 2
  • Junzuo Lai
    • 2
    Email author
  1. 1.ZhongAn Information Technology Service Co., Ltd.ShanghaiChina
  2. 2.Jinan UnivesityGuangzhouChina

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