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Probabilistic Public Key Encryption with Equality Test

  • Guomin Yang
  • Chik How Tan
  • Qiong Huang
  • Duncan S. Wong
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5985)

Abstract

We present a (probabilistic) public key encryption (PKE) scheme such that when being implemented in a bilinear group, anyone is able to check whether two ciphertexts are encryptions of the same message. Interestingly, bilinear map operations are not required in key generation, encryption or decryption procedures of the PKE scheme, but is only required when people want to do an equality test (on the encrypted messages) between two ciphertexts that may be generated using different public keys. We show that our PKE scheme can be used in different applications such as searchable encryption and partitioning encrypted data. Moreover, we show that when being implemented in a non-bilinear group, the security of our PKE scheme can be strengthened from One-Way CCA to a weak form of IND-CCA.

Keywords

Public Key Encryption Adaptive Chosen Ciphertext Attacks Ciphertext Comparability Searchable Encryption Bilinear Map 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Guomin Yang
    • 1
  • Chik How Tan
    • 1
  • Qiong Huang
    • 2
  • Duncan S. Wong
    • 2
  1. 1.Temasek LaboratoriesNational University of Singapore 
  2. 2.Department of Computer ScienceCity University of Hong Kong 

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