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Encranger, short for 'ENCryption by RAndom Number GeneratoR' is a tool to encrypt en de-encrypt single-line text messages. MultiEncranger is the multi-line version of Encranger.
The source code is hosted at the Encranger GitHub.
View a screenshot of 'Encranger' (version 3.0)(png)
View a screenshot of 'Encranger' (version 3.0)(png)
Download the 'Encranger' Windows executable (latest version)(zip) Download the 'Encranger' Windows executable (latest version)(zip) Download the 'Encranger' Windows executable (latest version)(zip)
The Encranger encryption algorithm is a form of the Vigenere cipher. In the Vigenere cipher the shift of letters differs per position and are determined by the letters in a keyword. In the Encranger algorithm these shifts are determined by a random number generator, set by a key.
To make this clear, I will first briefly explain Caesar cipher, then I ll explain Vigenere cipher and finally show the difference between the Vigenere cipher and the Encranger algorithm.
Caesar cipher encrypts text by adding a value to each letter in a word. This value is the key or password. For example, the text AAAAA with the key +1 becomes BBBBB .
Vigenere cipher encrypts text by adding a value to each letter in a word, in which the shift changes per letter. For example, the key ABCDE might hold the shifts +1 +2 +3 +4 +5 . The plaintext AAAAA encrypted by the key ABCDE then becomes BCDEF .
Encranger, as Vigenere cipher, encrypts text by adding a value to each letter in a word, in which the shift changes per letter. These shifts are not determined by a word, but are generated randomly using a value (the key). For example, using an alphabet of only five letters, the value of 123 generates a shift sequence of +5 +3 +1 +2 +4. The plaintext AAAAA encrypted by the value 123 then becomes ADBCE. Encranger uses n (about fifty) characters, consisting of letters and punctuation characters. For a certain Encranger key, it is theoretically possible to calculate the Vigenere cipher key (also of n characters). Because Encranger uses the C++ random number generator to generate a random sequence of letter shifts, it is estimated that Encranger only has 32768 (RAND_MAX) or 4294967296 (2^32, the maximal integer value) different keys, instead of the highest possible, which would be the factorial of n.
Download the 'Encranger' Windows executable (version 3.0)(zip) View a screenshot of 'Encranger' (version 2.1)(png) View a screenshot of 'Encranger' (version 2.0)(png) View a screenshot of 'Encranger' (version 1.0)(png)
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