Password
A secret string entered to prove a user's identity, which a system compares against a stored value before granting access. Short or predictable passwords are vulnerable to guessing and brute-force attacks.
Bill Burr, who wrote the 2003 NIST guidelines recommending passwords mix uppercase, numbers, and special characters, later said he regretted it — his reference material was from the 1980s. Experts now say long passphrases of multiple words are both safer and easier to remember.
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