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Gemstone: A New Stream Cipher Using Coupled Map Lattice

  • Ruming Yin
  • Jian Yuan
  • Qiuhua Yang
  • Xiuming Shan
  • Xiqin Wang
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6151)

Abstract

In this paper, we propose a new stream cipher Gemstone by discretizing coupled map lattices (CML), which is a nonlinear system of coupled chaotic maps. Gemstone uses a 128-bit key and a 64-bit initialization vector (IV). We show that there is no high probability difference propagations or high correlations over the IV setup scheme. Thus the IV setup of Gemstone is very secure. We also verify that the largest linear correlations between consecutive key streams are below the safe bounds. Gemstone is slightly slower than AES-CTR, but its initialization speeds are higher than some finalists of eSTREAM.

Keywords

Stream cipher coupled map lattice confusion and diffusion differential cryptanalysis linear cryptanalysis 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Ruming Yin
    • 1
  • Jian Yuan
    • 1
  • Qiuhua Yang
    • 1
  • Xiuming Shan
    • 1
  • Xiqin Wang
    • 1
  1. 1.Department of Electronic EngineeringTsinghua UniversityBeijingChina

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