Brute Force

Try searching for documentaries of different fighting techniques. I think I saw one from Discovery channel or a channel with something in the line like that. It demonstrates brute force use in different fighting techniques such as boxing, kung fu, wushu and others.

To me it seems the comments of the previous posters were a little vague on what it actually is, afterall the most important thing to remember when talking about brute force attacks is constraints. Case study: A website has a password ("WIN") that is a maximum of 3 characters long and can only be composed of capital letters. Based on this, we can set constrains on our brute force program and the attack would follow the following pattern: A B C ... AA AB AC ... BA BB BC ... AAA AAB AAC AAD ... WIN

To make it short, it's a kind of attack that attempts every possible input to find the correct one. Often used to guess passwords, it tries all possible combinations of letter, numbers and symbols (starting with the most frequently used) to find which one is correct. Such kind of attack always succeeds, because soon or latter it will try the correct one. The downside is that trying every one takes a long time, and with long and complex passwords it can easily take years to put them all, reason for which this attack is not feasible and unlikely to be tried against most systems.