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Improved Encryption and Decryption Methods (Read 331 times)
Circuit
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Improved Encryption and Decryption Methods
Sep 25th, 2012 at 5:38pm
 
During this past summer I read a very interesting book called The Code Book by Simon Singh. I became obsessed with the subject of cryptography, and I decided to write some algorithms of my own. This file contains methods which build upon the Vigenere substitution algorithm found in the Simple Test Game file. My methods use modular arithmetic to keep all characters in the range of ASCII #32 (space) to #126 (tilde), which ensures that every output character will be readable and copyable. The methods also perform the additional step of transposing (i.e. shuffling) the characters after the Vigenere substitution takes place. The resulting ciphertexts are more difficult to crack than regular Vigenere texts.

These methods can encrypt and decrypt every character on the keyboard except for tab and carriage return. They should work well for encrypting and decrypting save game files and text messages.

Sample:
Plaintext: Mike Richardson
Password: SilverCreator
Ciphertext: exs9*(y41UJW>C+

Download link:
http://www.mediafire.com/?nai3fiytlaylth6
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« Last Edit: Sep 25th, 2012 at 5:44pm by Circuit »  

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Plaza Mike
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Re: Improved Encryption and Decryption Methods
Reply #1 - May 24th, 2013 at 1:52am
 
I mirrored the file here since MediaFire might delete the file.

http://www.silvercreator.net/downloads/CircuitsSCEncryptionMethods.zip
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Mike Richardson
 
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