Cryptography & Software Security Project

Encryption Algorithm

Assignment of values:
Letters A,B,..,Z as 1,2,..,26.
Digits 1,2,..,9 as 27,28,..,35.
Digit 0 as 0 only.
PT is divided into blocks of 16 bytes represented by Matrix Mp.
Key is array K of size 16 which has values generated from random(1,26) with repetition.
Perform transpose of Mp as Mp^T
Formulate Encrypted Key matrix Ke using for i in Ke: i=i%2
Resultant Matrix Cpk = Mp^T + Ke
Since Cpk is a 4x4 matrix,
Rotate 1st row by 1 element, 2nd row by 2 elements, 3rd row by 3 elements, 4th row by 0 elements. This gives matrix Chr.
Rotate 1st column by 1 element, 2nd column by 2 elements, 3rd column by 3 elements, 4th column by 0 elements. This gives matrix Cvr.
Matrix Cvr is the final encrypted block

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Nevil		Nevil
CSS Research paper-Nevzz.pptx		CSS Research paper-Nevzz.pptx
Nevil-Crystal-Melwyn-CSS-Research-Paper.pdf		Nevil-Crystal-Melwyn-CSS-Research-Paper.pdf
PPT Talk-Nevil.txt		PPT Talk-Nevil.txt
README.md		README.md