/*
* A5/1 Implementation
*
* Information: http://en.wikipedia.org/wiki/A5/1
* Released:    28th September 2008
* App Options: Debugging mode: -d
*
* Written By: Brett Gervasoni (brett.gervasoni [at] gmail.com)
*
* Notes: 
* - Debugging mode will show step by step processes
* - If order matters then put things in order to begin with!
*   Polynomials, clocking bits, and maximum register lengths.
* - If data is not in order the application will try its best to make
*   the cipher work. 
* - Polynomials for each register are chosen based on their largest exponent
*   being less than register length. 
*/

An implementation of the A5/1 cipher written in PHP. A5/1 is the current 
encryption cipher used in Telstra GSM phones.