Net Structure and Cryptography

Hisao SHIZUKA  Yutaka MOURI  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E75-A    No.10    pp.1422-1428
Publication Date: 1992/10/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Application of Petri Nets to Concurrent System Design)
petri net,  cryptography,  T-invariant,  bit,  marking,  

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This paper describes a modeling of the cryptography based on a concept of Petri nets. Movement of tokens in the net model shows a dynamic behavior of systems. On the other hand, the cryptography is considered as a bit operation, so that we can point out a common property between the net structure and the cryptography, which provides our idea that movement of tokens of the net model corresponds to a bitoperation of the cryptography. Some effective keys in the net model are considered by means of the net elements, which are based on T-invariant and net structures. It is shown that the keys of the net structured cryptography provide reasonable strength comparing with the data encryption standard (DES).