On Encryption of a Petri Net based Multi-Stage-Encryption Public-Key Cryptography

  • Ge, Qi-Wei (Faculty of Education, Yamaguchi University) ;
  • Chie Shigenaga (Faculty of Education, Yamaguchi University) ;
  • Mitsuru Nakata (Faculty of Education, Yamaguchi University) ;
  • Ren Wu (Part-time Lecturer of Yamaguchi University)
  • 발행 : 2002.07.01

초록

A new conception of public-key cryptography MEPKC, Petri net based Multi-stage-Encryption Public-Key Cryptography, has been proposed in onder to guarantee stronger network communication security. Different from an ordinary public-key cryptography that opens only a single public key to the public, MEPKC opens a key-generator that can generate multiple encryption keys and uses these keys to encrypt a plain text to a cipher text stage by stage. In this paper, we propose the methods how to carry out the encryption operations. First, we describe how to design a hash function H that is used to conceal the encryption keys from attack. Then, given with a key-generator (a Petri net supposed to possess a large number of elementary T-invariants), we discuss how to randomly generate a series of encryption keys, the elementary T-invariants. Finally, we show how to use these encryption keys to encrypt a plain text to a cipher text by applying a private key cryptography, say DES.

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