" A brute force attack is an trail and error method used to obtain information such as a user password or Personal Identity 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.
- A brute force attack is also known as brute force cracking or simply brute force.
If the key is 8-bit long then no.of possible ways are 2^8 = 256 ways.
- The time to complete the attack would be very high is the key is long.
- A brute force attack is a crypto analysis attack that can, in theory, be used to attempt to decrypt any kind of encrypted data.
- The attacker Systematically checks all possible passwords until the correct one is found.
- In a reverse brute force attack a single password is tested against the multiple usernames or encrypted files.
Software that performs burte force attacks:-
- Aircrack-ng
- Hashcat
- RainbowCrack etc
Certain types of encryption by their mathematically properties cannot be defated by brute force attack.
An example of this is "One-time Pad Cryptography", Where every clear text bit has a corresponding key from a truly random sequence of key bits.
Forms of Brute Force Attack :-
One example of a type of brute force attack is knwon as Dictionary Attack, which might try all the words in a dictionary.
Prevention Ways:-
There are the following ways can be used to defend against the brute-force attack:
- Require users to create complex passwords
- Limiting the number of times a user can unsuccessfully attempt to login.
- Temporarily locking out users who exceed the specified maximum number of failed login attempts.
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