On the Security of a Searchable Anonymous Attribute Based Encryption

Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 655)

Abstract

Ciphertext Policy Attribute-based Encryption(CP-ABE) is a public key primitive in which a user is able to decrypt a ciphertext if the attributes associated with secret key and the access policy connected with ciphertext matches. Although CP-ABE provides both confidentiality and fine-grained access control to the data stored in public cloud, anonymous CP-ABE adds interesting feature of sender and/or receiver anonymity. In this paper, we discuss a recent work on anonymous CP-ABE [1], which aims to provide secure and efficient data retrieval anonymously. We show that the scheme has major security weakness and does not ensure anonymity feature, which is the main claim of the scheme. We then present an improved scheme for mitigating the weaknesses of the scheme. The improved scheme retains the security claims of the original scheme [1] without adding any computation and communication overhead.

Keywords

Attribute based encryption Anonymity Confidentiality Access structure 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2017

Authors and Affiliations

  1. 1.DA-IICTGandhinagarIndia
  2. 2.LDRPGandhinagarIndia

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