文章基本信息

标题：Enhancement of Security through an Efficient Substitution-based Block Cipher of Bit-level Implementation with Possible Lossless Compression
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作者：Pranam Paul ; Saurabh Dutta ; A K Bhattacharjee 等
期刊名称：International Journal of Computer Science and Network Security
印刷版ISSN：1738-7906
出版年度：2008
卷号：8
期号：4
页码：318-326
出版社：International Journal of Computer Science and Network Security
摘要：This paper presents a substitution-based block cipher that considers a file to be encrypted as a bit-stream. The cipher implements a storage efficient algorithm through which along with encryption a reduction in size is also achieved. As encryption is done at bit label, this algorithm can be implemented on any kind of files. A tendency of increase in execution time is observed. The proposed technique is compared with the existing International Data Encryption Algorithm (IDEA) with respect to execution time and degree of non-homogeneity. A generalized expression for the key space is formularized.
关键词：cryptography, encryption, decryption, cipher, private key, symmetric key, plain text, cryptographic modeling