期刊名称：International Journal of Engineering and Computer Science
印刷版ISSN：2319-7242
出版年度：2014
卷号：3
期号：8
页码：7596-7576
出版社：IJECS
摘要：Data transmission in real time environment has been invoked by trustworthy persons as well as in internet media it resides onsecure communication channel. The introduction of internet increases security issue twice for exchanging the information electronically.Cryptography is the process of scrambling the data into unknown format. This process is done with the help of encryption & de cryptionalgorithm. The basic two ideas behind the cryptographic techniques are substitution & transposition. The Caesar cipher substitution methodis used to alter the plaintext characters with the help of automatic key. This paper presents a multi stage encryption algori thm. At the end ofeach stage an intermediate cipher is produced. The transposition is employed by using crossover method of genetic algorithm. Finalciphertext is derived from the combined effect of basic arithmetic & logic operations.
关键词：SDES key generation; substitution; transposition; crossover; mutation; encryption and decryption
