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Publication Detail
A Verifiable Secret Shuffle of Homomorphic Encryptions
  • Publication Type:
  • Authors:
    Groth J
  • Publisher:
  • Publication date:
  • Pagination:
    145, 160
  • Volume:
  • Series:
    Lecture Notes in Computer Science
  • Editors:
    Desmedt Y
  • Status:
  • Name of conference:
    Public Key Cryptography - PKC: 6th International Workshop on Theory and Practice in Public Key Cryptography
  • Conference place:
    Miami, US
  • Conference start date:
  • Conference finish date:
We show how to prove in honest verifier zero-knowledge the correctness of a shuffle of homomorphic encryptions (or homomorphic commitments.) A shuffle consists in a rearrangement of the input ciphertexts and a reencryption of them so that the permutation is not revealed. Our scheme is more efficient than previous schemes both in terms of communication complexity and computational complexity. Indeed, in the case of shuffling ElGamal encryptions, the proof of correctness is smaller than the encryptions themselves.
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