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BruteForce Attack

*Brute Force Attack*

Hi today we will be talking about *Brute Force Attack* deeply or briefly so lets start.....

 What is Brute Force Attack?
 A brute force attack is a trial-and-error method used to obtain information such as a user password or personal identification number (PIN). In a brute force attack, automated software is used to generate a large number of consecutive guesses as to the value of the desired data.

 How long do brute force attacks take?
 As per this link, with speed of 1,000,000,000 Passwords/sec, cracking a 8 character password composed using 96 characters takes 83.5 days. But a recent research presented at   Password^12 in Norway, shows that 8 character passwords are no more safe. They can be cracked in 6 hours.

 What is the brute force method?
 In computer science, brute-force search or exhaustive search, also known as generate and test, is a very general problem-solving technique that consists of systematically   enumerating all possible candidates for the solution and checking whether each candidate satisfies the problem's statement.

 How long does it take to brute force a 10 character password?
 Nine-character passwords take five days to break, 10-character words take four months, and 11-character passwords take 10 years. Make it up to 12 characters, and you're         looking at 200 years' worth of security – not bad for one little letter.

 How many passwords can you check per second?
 A password-cracking expert has unveiled a computer cluster that can cycle through as many as 350 billion guesses per second. It's an almost unprecedented speed that can try  every possible Windows passcode in the typical enterprise in less than six hours.

 Difference between brute force attack and dictionary attack?
 A dictionary attack means that you probe only passwords/keys from a dictionary (which does not contain the complete keyspace). A brute force attack is primarily used against  the encryption algorithm itself (you can also use this against passwords but there you use dictionary attacks most time).

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