文章基本信息

标题：ENCIPHER A Text Encryption and Decryption Technique Using Substitution-Transposition and Basic Arithmetic and Logic Operation
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作者：Devendra Prasad ; Govind Prasad Arya ; Chirag Chaudhary 等
期刊名称：International Journal of Computer Science and Information Technologies
电子版ISSN：0975-9646
出版年度：2014
卷号：5
期号：2
页码：2334-2337
出版社：TechScience Publications
摘要：In this age of universal electronics connectivity, of viruses and hackers, of electronic eavesdropping and electronic fraud, there is indeed no time at which security does not matter. The explosive growth in computer systems and their interconnections via network has increased the dependence of both organizations and individuals on the information stored and communicated using these systems. This, in turn, has led to a heightened awareness of the need to protect data and resources from disclosure, to guarantee the authenticity of data and messages, and to protect systems from network-based attacks. The disciplines of cryptography and network security have matured, leading to the development of practical, readily available applications to enforce network security. In this paper we have proposed a cipher which uses basic encryption techniques of substitution and transposition along with application of logic gates, in order to encrypt the data. The algorithm makes cryptanalysis even more difficult because of the use of “Random Number Generator” function which further decides order of encryption rounds and keys to be used to encrypt the plain text. This eliminates the overhead of defining a fixed key by the user and makes algorithm secure also. It also facilitates to transfer the key to the receiver while being added with the plain text at random locations (like added at end or beginning).
关键词：Cipher; Cipher text; Decryption; Encryption;Information Security; Key; Plaintext; Random number;Substitution; Transposition; Logical NOT operation; modulus;function.