The most common type of attack is password guessing. Attackers can guess passwords locally or remotely using either a manual or automated approach.
Automated password guessing programs and crackers use several different approaches. The most time consuming—and most successful—attack method is the brute-force attack, in which the attacker tries every possible combination of characters for a password, given a character set (e.g., abcd…ABCD…1234…!@#$) and a maximum password length.
Types of Password attack
1. Brute-force attack
2. dictionary attack
3. Hybrid attack
4. Birthday attack
5. rainbow attack
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