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There is no single “key” to password hacking. Attackers may trick you into giving up a password, reuse credentials exposed in another breach, guess likely choices, or test guesses against stolen password hashes. The strongest practical defenses are unique passwords, a password manager, multifactor authentication (MFA), and secure password storage by the services you use.
The phrase “123456 The Key To Password Hacking” does not identify a specific book, course, or product in the available sources. This guide explains the ordinary meaning of password hacking and what makes accounts harder to compromise.
How do attackers get passwords?
“Password hacking” can describe several different ways of obtaining or exploiting credentials. Knowing which method is involved matters: a longer password helps against guessing, but does not stop someone from capturing it on a fake login page.
Phishing captures credentials you enter
An attacker may create a convincing lookalike sign-in page and persuade you to enter your password there. The attacker gets the credential because you submitted it; adding more characters does not prevent that. NIST’s password guidance discusses phishing as a way passwords are stolen.
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Credential stuffing exploits password reuse
When credentials are exposed in one breach, attackers may try the same username-and-password combinations on other services. This is credential stuffing, not a password being “cracked” on each target. A unique password for every account prevents a leaked password from automatically opening your other accounts. See the Canadian Centre for Cyber Security’s credential-stuffing guidance.
Guessing and spraying target likely choices
Attackers may try common or predictable passwords against one account, or test a small set of likely passwords across many accounts. These approaches are often grouped under brute-force attacks, but they differ from phishing and credential stuffing. OWASP describes these attack categories in its brute-force attack overview. Services can reduce exposure with rate controls and by screening new passwords against commonly used or compromised values.
Stolen password hashes allow offline guessing
A service should not store passwords in readable form. It should store a verifier—typically a salted, deliberately costly password hash—so it can check a login attempt without keeping the original password. If attackers steal that database, they may test guesses locally rather than submit them through the service’s login page, where attempt limits might apply. Hashing is not encryption: a hash is not simply decrypted back into the password. A slow password-hashing function makes each guess more expensive, while a unique salt helps prevent identical passwords from producing identical stored values and frustrates precomputed lookup tables. NIST explains the offline-guessing distinction in its consumer password guidance.
What makes a password safer to use?
Make it long and unique
NIST recommends using at least 15 characters when a password is required and suggests passphrases as one way to make passwords easier to remember. A password manager can generate and keep a different password for each account. NIST also recommends avoiding password reuse and describes password managers in its password guidance.
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Length and uniqueness address different risks. A long password can make guessing harder; a unique password limits the damage if another service is breached. Neither protects you if you type the password into a phishing site or your device is compromised.
Do not rely on special-character rules alone
Numbers and symbols do not make a short, predictable password a safe choice. Prioritize length and uniqueness rather than assuming that a required mix of character types makes a password strong. As NIST’s consumer guidance puts it, Ryan Galluzzo, who leads NIST’s Digital Identity Program, says: “The worst password I can think of is ‘password’ or ‘12345.’”
Use MFA, passkeys, or a password manager for different jobs
A password manager chiefly helps you create and use unique credentials. MFA adds another authentication factor, though methods differ in resistance to phishing. Passkeys and phishing-resistant MFA, where a service supports them, can make it harder for a fake sign-in page to steal a reusable password. Before relying on any method, check service compatibility and how you will recover access if you lose a device. NIST describes MFA and passkeys; CISA recommends phishing-resistant MFA where possible in its 2023 advisory.
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Change a password when it is compromised
If a password has been exposed, change it on the affected service and anywhere else you reused it. Routine forced changes, without evidence of compromise, can encourage predictable variations. CISA discusses this risk in its advisory.
What should a service do to protect stored passwords?
Password creation is only part of the picture. The service that verifies your login is responsible for storing passwords in a form that resists offline guessing if its database is stolen.
Use an adaptive password-hashing scheme
NIST SP 800-63B Revision 4 says verifiers shall store passwords in a form resistant to offline attacks, using a salt and a suitable password-hashing scheme with a cost factor. It requires salts of at least 32 bits and says the cost should be as high as practical without harming verifier performance, with increases over time as computing performance improves. NIST also says verifiers should add a keyed hashing or encryption iteration using a secret known only to the verifier; if used, that secret must be stored separately and should be protected in hardware such as an HSM or TEE. See the current NIST SP 800-63B Revision 4.
OWASP’s maintained Password Storage Cheat Sheet recommends Argon2id, with a baseline configuration of 19 MiB of memory, two iterations, and parallelism degree one. It also lists bcrypt and PBKDF2 as alternatives in relevant environments. These are implementation recommendations, not a universal setting for every service: operators need to test performance, account for their environment, and revisit parameters as guidance evolves.
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Avoid plaintext, ordinary encryption, and fast general-purpose hashes
Storing readable passwords exposes users immediately if a database is accessed. Ordinary reversible encryption is not the standard way to validate passwords, because anyone with the decryption key could recover them. Fast general-purpose hashes also make large numbers of guesses cheaper than a purpose-built, adaptive password-hashing scheme. OWASP’s storage guidance explains these risks and suitable alternatives.
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Balance guess cost with service performance
Increasing the work required for each guess raises the cost of offline attacks, but the service must still handle legitimate logins. Operators should choose parameters that are practical for their systems, retain algorithm and parameter information so hashes can be migrated, and protect any additional secret separately. NIST’s guidance emphasizes setting the cost as high as practical for verifier performance and increasing it as computing improves; OWASP provides implementation options in its cheat sheet.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How fast can passwords be guessed?
NIST uses 100 billion password guesses per second on a modern PC as an illustrative rate in its consumer guidance. It is not a universal benchmark for every computer, attack setup, or password-hashing scheme. In particular, the figure should not be read as the rate for online login attempts or for a database protected with any specific hashing configuration. The practical lesson is that stolen hashes can be tested offline, so services need costly password hashing and users should avoid short or reused passwords. See NIST’s explanation.
What can you do now?
- Use a password manager. Generate a long, unique password for each account instead of reusing one you already know.
- Protect your most important accounts with MFA. Prefer phishing-resistant MFA or a passkey when the service supports it, and review recovery options before you need them.
- Replace exposed passwords. If a service reports a breach or you suspect a password was captured, change it there and anywhere else you reused it.
- Be deliberate at sign-in. Check that you are on the service’s genuine site or app before entering credentials; a strong password cannot protect against handing it to a convincing fake page.
For organizations, CISA also advises against exposing privileged credentials in scripts and recommends reducing their exposure in systems. That operational risk is separate from the strength of an individual user’s password; see CISA’s advisory.
What does “key” mean in password security?
In ordinary language, “the key to password hacking” might mean the central trick attackers use. There is no single trick: the attack may target a person, password reuse, a login service, or a stolen database.
In cryptography, a password can also be an input to a key-derivation function. NIST SP 800-132 addresses deriving master keys from passwords or passphrases to protect stored data or data-protection keys. That is a distinct problem from a website verifying a password for authentication; SP 800-132 concerns storage applications, while SP 800-63B addresses digital identity and authentication. See NIST SP 800-132 and NIST SP 800-63B Revision 4.
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