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Some Remarks on Universal Re-encryption and A Novel Practical Anonymous Tunnel

  • Tianbo Lu
  • Binxing Fang
  • Yuzhong Sun
  • Li Guo
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3619)

Abstract

In 2004 Golle, Jakobsson, Juels and Syverson presented a new encryption scheme called the universal re-encryption [GJJS04] for mixnets [Cha81] which was extended by Gomulkiewicz et al. [GKK04]. We discover that this scheme and its extension both are insecure against a chosen ciphertext attack proposed by Pfitzmann in 1994 [Pfi94]. Another drawback of them is low efficiency for anonymous communications due to their long ciphertexts, i.e., four times the size of plaintext. Accordingly, we devise a novel universal and efficient anonymous tunnel, rWonGoo, for circuit-based low-latency communications in large scale peer-to-peer environments to dramatically decrease possibility to suffer from the attack [Pfi94]. The basic idea behind rWonGoo is to provide anonymity with re-encryption and random forwarding, obtaining practicality, correctness and efficiency in encryption in the way differing from the layered encryption systems [Cha81] that can be difficult to achieve correctness of tunnels.

Keywords

Side Information Malicious Node Replay Attack Node Versus Probability Node 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Tianbo Lu
    • 1
    • 2
  • Binxing Fang
    • 1
    • 2
  • Yuzhong Sun
    • 1
    • 2
  • Li Guo
    • 1
    • 2
  1. 1.Software Division, Institute of Computing TechnologyChinese Academy of SciencesBeijingP.R. China
  2. 2.Graduate School of Chinese Academy of SciencesBeijingP.R. China

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