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Secure password: how to create, check, and manage strong passwords

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A strong password is your best defense against account takeover. Learn why a secure password matters, how many characters it should use, which methods work best, how to use a password manager, and how to secure your Wi-Fi with a robust key.

16.10.2025 | Reading time: 4 minutes

What makes a password secure and when is it truly safe

A password is secure when it is long, unpredictable, and unique. That means no reuse, no names or dates, no dictionary words. Favor length over “complexity,” use random strings or long passphrases, and enable multi-factor authentication (MFA).

Key takeaways

  • Length increases entropy and reduces risk.
  • Uniqueness prevents cascade damage after a breach.
  • Unpredictability defeats dictionary and pattern attacks.

How many characters should a secure password have?

For everyday accounts, 12–16 characters is a solid baseline. For sensitive access (email, banking, admin portals, password manager), aim for 16–20+.

Scenario

Minimum length

Notes

Standard accounts

12–16

Unique and random

Email, primary ID

16–20+

Turn on MFA

Banking, admin, cloud console

16–24+

Strong and exclusive

Home Wi-Fi (WPA2/WPA3)

16–20+

Fully random, no words

Methods that help you create strong passwords

There’re two strong options you can use together:

  • Random generator in a manager: create 16–24 characters. Letters and digits are often enough; symbols are a bonus.
  • Random-word passphrase: pick 4–5 unrelated words and chain them. Avoid simple substitutions. Strong yet memorable.

Create a secure password in 60 seconds

  • Open your manager and set the generator to 16–20+.
  • Generate for this account only and save immediately.
  • Enable MFA and store recovery codes safely.
  • Replace the old password and sign out of active sessions.

What a strong password looks like?

  • Random: n3Wq7Zk4hF2y0pBd
  • Passphrase: Moss Canal Lemon Lantern Planet
    Both are long, unpredictable, and never reused.

How secure is my password?

Trust the principles over online checkers. What matters is length, uniqueness, randomness, and MFA. If you test, use dummy passwords, never your real one.

Password managers: how safe are they and why use them?

Managers create long, unique passwords and store them encrypted. They sync across devices, flag breaches, and help rotate compromised credentials.

Feature

Why it matters

Random generator

High entropy with minimal effort

End-to-end encryption

Protection on every device

MFA and device binding

Safety if a device is lost

Security audit and breach alerts

Faster incident response

Why secure passwords matter?

Stolen passwords lead to account takeover, identity theft, and financial loss. Long, unique passwords limit risk even if one service is breached. MFA reduces residual risk further.

How to secure your Wi-Fi with a password?

Use WPA3 where possible (or WPA2-AES), a very long random key (16–20+), disable WPS, change default router passwords, keep firmware updated, and isolate an IoT guest network.

Practical checklist in 5 steps

  • Install a password manager and generate a unique password per account.
  • Increase length: minimum 12, 16–20+ for key accounts.
  • Enable MFA and store recovery codes.
  • Eliminate reuse and rotate after any leak.
  • Lock down Wi-Fi with WPA3 and a long random key.

FAQs

How do I create a secure password?

Use your manager’s generator, 16–20+ characters, random and unique, or a long passphrase.

Are password managers safe?

Yes, with a strong master password, MFA, and regular updates.

How many characters do I need?

At least 12, ideally 16–20+ for important accounts and Wi-Fi.

How do I secure Wi-Fi?

WPA3, 16–20+ random characters, WPS off, change router password, keep firmware current.

Which method is best?

Random generator or long passphrase, always with MFA

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