Password Requirements

Passwords are a first line of defense in protecting Princeton information.  When combined with strong device protection and other tools like encryption, passwords help prevent unauthorized access to information while safeguarding your personal privacy.

Password Requirements

Devices used to access information classified as Restricted, Confidential, or Unrestricted within Princeton must be password-protected. Princeton permits the use of both passphrases and complex passwords.


A passphrase is a password consisting of a long sentence or phrase.  A passphrase:

  • Must be between 15 and 127 characters in length, consisting of letters and spaces, AND;
  • Contain at least 1 number OR 1 symbol, such as ( !"# $%&'()*+,-./:;<=>?@[]^_`{|}~).

Complex Password

Shorter but more complex passwords of less than 15 characters must contain ALL of the following:

  • A minimum of 10 characters 
  • 1 uppercase letter
  • 1 lowercase letter
  • 1 number
  • 1 symbol, such as ( !"# $%&'()*+,-./:;<=>?@[]^_`{|}~)

Build a better password. See OIT's password best practices.

How to Safeguard Your Passwords

A single breach can compromise the entire Princeton network. When managing your passwords, keep these best practices in mind.

Use strong passwords. Passwords should be easy to remember for you, but difficult for others to guess.
Mix it up. Use different ID and password combinations on different sites.
Change regularly. We advise that you change your passwords at least once per year.
Never share. If you need to share access to information with another individual, review this information about secure send and see a list of alternatives to sharing passwords.
Choose password managers wisely. Systems that secure your password list in an encrypted file have become popular. See a list of OIT-suggested options.

Princeton's Central Authentication Service (CAS)

CAS powers secure access across a range of web-based University applications, safeguarding your identity and credentials, while restricting access to information and licensed programs. 

Need to change your CAS password? Visit PUaccess.

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