期刊名称：International Journal of Advanced Research In Computer Science and Software Engineering
印刷版ISSN：2277-6451
电子版ISSN：2277-128X
出版年度：2013
卷号：3
期号：3
出版社：S.S. Mishra
摘要：Cryptography is an art and science of converting original message into nonreadable form means 'secret writing' . Two techniques are used for converting data into nonreadable form: 1) Transp osition technique 2) Substitution technique. One Time Pad is an example of substitution method. As One Time Pad has various limitations so this talk will present a perspective on combination of techniques substitution and transposition. A double columnar transposition method is applied on One Time Pad in order to overcome limitations of One time Pad cipher and provide much more secure and strong cipher.
关键词：substitution; transposition; cryptography; One Time Pad cipher; cryptanalysis
