Journal on Communications ›› 2013, Vol. 34 ›› Issue (11): 153-161.doi: 10.3969/j.issn.1000-436x.2013.11.017

• Technical Report • Previous Articles     Next Articles

Optimistic Mix-net protocol based on bilinear pairings

Long-hai LI,Shao-feng FU,Rui-dan SU   

  1. School of Computer Science and Technology, Xidian University, Xi'an 710071, China
  • Online:2013-11-25 Published:2017-06-23
  • Supported by:
    The National Natural Science Foundation of China;The Fundamental Research Funds for the Cen-tral Universities

Abstract:

A novel pairing-based optimistic Mix-net scheme was proposed. The key management is made easier by em-ploying bilinear paring primitives and there is no need for the participating mix servers to re-generate keys jointly be-tween mix-sessions to avoid providing decryption oracle service to other mix-sessions. Integrity of messages during mix-ing is partially guaranteed by using dummy messages tracing technology resulting in a simpler construction for proofs“ ”of correctness. An optimization method for the joint E mal decryption involved in the protocol was also proposed, which can reduce the number of exponentiations computed by each mix server. The Mix-net will shuffle and decrypt in-put ciphertexts much faster than all previous Mix-nets with public verifiability when all mix servers execute the mixing protocol honestly.

Key words: anonymous communication, optimistic mix network, bilinear pairings, proof of secret shuffling

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