Topics Map > University of Chicago > IT Services > Accounts, Identity, & Security > Identity Management
The CNetID passphrase functions identically to a CNetID password by authenticating you for all the common services you are eligible to use based on your affiliation with the University. The passphrase you choose must be at least 19 or more characters long. Passphrases rely on their length to match the complexity of the multiple character classes required in passwords.
Passphrases should be long (since they rely on length instead of complexity like passwords do), memorable to you, contain unexpected characters (symbols and upper and lowercase letters), and should never be famous or well-known quotes or be something that can easily be found online. Passphrases are easier to create than you may think; examples of good passphrases could include least favorite activities such as "Jury Duty @ The Dentist%," a funny phrase such as "Knitting at A Taxidermy convention!?", a list of favorite items in some category, or a list of the names of your childhood pets, such as "Fido & Mr.Kitty & Bandit".
For more information on choosing good passwords and passphrases, please see the article, Choosing Good Passwords or Passphrases and Keeping Them Secure