Archive for November, 2008

Playfair Cipher in Navision

As earlier mentioned I have being reading some books about Cryptology – and now its Playfairs turn to be tested in Navision :-)

Playfair Cipher (aka. Playfair square) is a symmetric encryption technique and was the first literal digraph substitution cipher. It was invented by Charles Wheatstone and popularized by Lyon Playfair.

The technique encrypts pairs of letters instead of single letters, which means it is a type of digraph cipher.
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