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SESK: Stuff Everyone Should Know · sesk.info/tech-password-length

Which password property most directly increases resistance to guessing?

More length creates a much larger space of possible passwords.

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  1. Changing it every week
  2. Adding more characters ✔
  3. Capitalizing the first letter

Why: Length is a primary strength factor because each added unpredictable character expands the search space. Predictable substitutions and forced complexity patterns often add less protection than users expect.

Huh, didn't know that: A passphrase can make a password longer while remaining easier to remember.

The dad joke
My password went to the gym to work on its length.
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References

Answer: Adding more characters. Length is a primary strength factor because each added unpredictable character expands the search space. Predictable substitutions and forced complexity patterns often add less protection than users expect.

  1. NIST SP 800-63B Strength of Passwords pages.nist.gov/800-63-4/sp800-63b/passwords
    Password length is a primary factor in characterizing password strength
    Checked 2026-10-10.

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