A Reversible Encryption Routine for PHP
By Tony Marston2005-04-15
Swapping between two different character strings
|
|
A better method is to use two different character sets - one for obtaining the index number of the source character (STRING1), and a second for converting this index number into a different target character (STRING2). The advantage is that there is no fixed rotation between one character and the next, which would make it difficult for any potential hacker. The disadvantage is that each source character will always be converted to the same target character, so once a source and target pair have been found they will always remain the same. This is not good.
Tutorial Pages:
» A Reversible Encryption Routine for PHP
» Rotating each character a fixed number of positions
» Swapping between two different character strings
» Manipulating the index number between the two strings
» Customising the Encryption Algorithm
» Class Variables
» Class Constructor
» The ConvertKey function
» The ApplyFudgeFactor function
» The CheckRange Function
» The Decrypt function
» Using the Encryption Class
» Summary
|
