Brute-Force Attack

Overview

A brute-force attack uses repeated guesses to discover a valid password, one-time code, cryptographic key, recovery answer, or hidden value. Attempts may be exhaustive, dictionary-based, distributed across sources, or optimized using leaked information and common patterns.

Online attacks interact with the target and can be slowed through rate limits, lockouts, challenges, and risk detection. Offline attacks operate on stolen password hashes or encrypted data, making strong algorithms, salts, key derivation, and credential complexity especially important.

Defenses include multifactor authentication, breached-password blocking, progressive delays, device and network correlation, secure hashing, monitoring, and alerts. Lockout rules require care because attackers may deliberately trigger them to deny access to legitimate users.

Brute-Force Attack is an attack or weakness pattern that repeatedly tries passwords, keys, codes, or other possibilities until one succeeds or a usable weakness appears. Brute-force resistance combines strong credentials and cryptography with rate controls, multifactor authentication, monitoring, and denial-of-service-aware lockout design.

Assessment of Brute-Force Attack should trace an attack or weakness pattern that repeatedly tries passwords, keys, codes, or other possibilities until one succeeds or a usable weakness appears from prerequisite and entry point through observable impact on the affected service. A theoretical weakness or scanner result involving attack, weakness pattern that repeatedly tries passwords, and keys should not be reported as exploitation without corroborating logs, transactions, or configuration evidence. Prevention, detection, containment, and recovery for the Brute-Force attack path should be tested against the architecture associated with attack, weakness pattern that repeatedly tries passwords, and keys.

Retesting for Brute-Force Attack should reproduce the Brute-Force attack path involving attack, weakness pattern that repeatedly tries passwords, and keys, examine adjacent paths, and verify the conditions for safely returning the affected service to normal operation.