Tagged: Cryptology

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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Caesars Cipher in Navision

Lately I have been reading some books about Cryptology and there I stumbled upon Caesars Cipher.

Caesars Cipher is a very simple form of Cryptation. Its method is to replace each plaintext letter with one a fixed number of places down the alphabet. The fixed number is the Key.

Ex. with a key 3 – the letter A will become D. B will become E etc.

So the word SECRET will be come VHFUHW.
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