Algorithm

Digital Fortress is about a group of scientists who crack codes for the government. One of their primary methods of cracking codes is called the brute force method. It is an algorithm because basically they try every possibility in order to eventually come up with the key to unlocking the code. For example, with a 3 digit key consisting of only 1s and 2s, the possibilities are 111, 112, 121, 122, 211, 212, 221, 222.

Algorithm - A methodical, logical rule or procedure that guarantees solving a particular problem