CISSP All Domains Practice test 4

Key stretching – Adding 1-2 seconds to password verification. If an attacker is brute forcing password and need millions of attempts it will become an unfeasible attack. Brute Force attacks uses the entire keyspace (every possible key), with enough time any plaintext can be decrypted. Effective against all key based ciphers except the one-time pad, it would eventually decrypt it, but it would also generate so many false positives the data would be useless.