Hill Cipher Implementation

The Hill cipher is a polygraphic substitution cipher based on linear algebra. It was the first polygraphic cipher in which it was practical to operate on more than three symbols at once.

This article do not cover algorithm behind the Hill cipher. We suggest to go through very simple explanation given on Wikipedia for detailed explanation on Encryption and Decryption.

Following is the implementation of the Hill cipher in C++ –


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Corresponding cipher text is – POHDXHCAFOZABNU
Inverse of a Key-

8 5 10
21 8 21
21 12 8

Corresponding decrypted text is – ACTBEFOREDAWNZZ


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