A HYBRID CRYPTOSYSTEM USING VARIABLE LENGTH SUB KEY GROUPS AND BYTE SUBSTITUTION

Hill cipher is developed using simple linear transformation. It is vulnerable to known-plaintext attack and there exist several methods in the direction of linear transformation to overcome the problems. HCM-EE is an improved method using Eigenvalue, but it is linear and too many mathematical operat...

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Veröffentlicht in:Journal of computer science 2014, Vol.10 (2), p.251-254
Hauptverfasser: Kaipa, Adi Narayana Reddy, Bulusu, Vishnu Vardhan, Koduru, Ramakrishna Reddy, Kavati, Durga Prasad
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Sprache:eng
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Zusammenfassung:Hill cipher is developed using simple linear transformation. It is vulnerable to known-plaintext attack and there exist several methods in the direction of linear transformation to overcome the problems. HCM-EE is an improved method using Eigenvalue, but it is linear and too many mathematical operations. In this study, an attempt has been made to introduce nonlinearity to the linear transformation based cryptosystem using byte substitution over GF (2 super( 8)) and a variable length sub key groups. The performance evaluation of the method is also studied and presented.
ISSN:1549-3636
1552-6607
DOI:10.3844/jcssp.2014.251.254