There are two general approaches to attacking a symmetric encryption scheme: cryptanalytic attacks and brute-force attacks.
Brute-force attack: The attacker tries every possible key on a piece of cipher text until an intelligible translation into plaintext is obtained.
On average, half of all possible keys must be tried to achieve success.
A brute force attack is a hacking method that uses trial and error to crack passwords, login credentials, and encryption keys.
It is a simple yet reliable tactic for gaining unauthorized access to individual accounts and organizations' systems and networks.
Typical brute force attacks make a few hundred guesses every second.
Simple passwords, such as those lacking a mix of upper- and lowercase letters and those using common expressions like '123456' or 'password,' can be cracked in minutes.
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