HeungKuk Jo

Publications (2)0 Total impact

• Conference Proceeding: GMEM-BSG: An Improved Large-Scale Memory Sequence Generator for Ubiquitous Applications

  HoonJae Lee, SangGon Lee, HyoTaek Lim, HeungKuk Jo
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  ABSTRACT: The number of output sequences has been proposed as a characteristic of binary sequence generators for cryptographic application, but in general most of binary sequence generators have single number of output sequences. In this paper, we propose a generalized memory sequence generator (GMEM-BSG), which is an improved Golic's memory sequence generator (MEM-BSG) and which has a large number of output sequences and a large scales of memory. We also derive period, linear complexity, and the number of output sequences of the GMEM-BSG.
  Convergence and Hybrid Information Technology, 2008. ICCIT '08. Third International Conference on; 12/2008
• Article: The Parallel High-Speed Word-based Nonlinear Functions

  HoonJae Lee, SangGon Lee, HeungKuk Jo
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  ABSTRACT: In this paper1 , we propose some parallel structures of the word-based nonlinear combine functions in word-based stream cipher, high-speed versions of general (bit-based) nonlinear combine functions. Especially, we propose the high-speed structures of popular four kinds in word-based nonlinear combiners using by PS-WFSR(Parallel-Shifting or Parallel- Structured Word-based FSR): m-parallel word-based nonlinear combiner without memory, m-parallel word- based nonlinear combiner with memories, m-parallel word-based nonlinear filter function, and m-parallel word-based clock-controlled function. In addition, we propose an implementation example of the m-parallel word-based DRAGON stream cipher, and determine its cryptographic security and performance.
  Convergence Information Technology, International Conference on.