Dept of Computer Science

Technical Staff

What are the password requirements?

Last updated: December 11th, 2015 09:55 AM

The passwords must follow the following history requirements:

  • You must wait at least a day between changing your password.
  • You may not reuse any of your previous 10 passwords.

The passwords must following the following complexity requirements:

  • The account passwords must be at least 10 characters long.

...passwords must meet the following minimum requirements when they are changed or created:

  • Passwords must not contain the user's entire samAccountName (Account Name) [Username] value or entire displayName (Full Name) value. Both checks are not case sensitive:
    • The samAccountName is checked in its entirety only to determine whether it is part of the password. If the samAccountName is less than three characters long, this check is skipped.
    • The displayName is parsed for delimiters: commas, periods, dashes or hyphens, underscores, spaces, pound signs, and tabs. If any of these delimiters are found, the displayName is split and all parsed sections (tokens) are confirmed not to be included in the password. Tokens that are less than three characters in length are ignored, and substrings of the tokens are not checked. For example, the name "Erin M. Hagens" is split into three tokens: "Erin," "M," and "Hagens." Because the second token is only one character long, it is ignored. Therefore, this user could not have a password that included either "erin" or "hagens" as a substring anywhere in the password.
  • Passwords must contain characters from three of the following five categories:
    • Uppercase characters of European languages (A through Z, with diacritic marks, Greek and Cyrillic characters)
    • Lowercase characters of European languages (a through z, sharp-s, with diacritic marks, Greek and Cyrillic characters)
    • Base 10 digits (0 through 9)
    • Nonalphanumeric characters: ~!@#$%^&*_-+=`|\(){}[]:;"'<>,.?/
    • Any Unicode character that is categorized as an alphabetic character but is not uppercase or lowercase. This includes Unicode characters from Asian languages.