User account and password sharing is prohibited in almost any circumstance. You should not log in as anyone other than yourself, and you should not allow anyone to log in as you. Passwords should never be shared or disclosed to anyone, nor should they ever be sent through e-mail.
Tips for Strong Passwords:
- Don't use a common word, a friend's name, a pet's name, your nickname, the name of your favorite team, etc. Co-workers, friends, and even casual acquaintances may know this information.
- Use a combination of letters, numbers and special characters ($, *, !, etc)
- Use the first (or second, or last) letter of each word in a phrase to create a passphrase. An example of a passphrase would be "I used to live in Detroit." Using the first letter of each word would result in IutliD. Adding a couple of special characters would give you a very strong password ($IutliD@).
- Use UPPER and lower case characters.
- Select something that you can easily remember but hard for others to guess.
- Use a different password for each system.
- Choose passwords that are a minimum of eight characters in length.
- Change your password when you suspect that it is compromised.
- Passwords should periodically be changed.
- Never re-use an old password.
- Do not attach the password to a terminal, keyboard or any part of a computer.
- Never write down your passwords, but if you must, keep the written password in a secure location, or use a password storing utility.
- Do not identify a password as being a password or reference the system to which it links.
- If the software or a utility asks you if you want it to "remember" your password, say "No." Also, never send a password to another person via e-mail.
- Destroy any paperwork that lists your account, user-ID or user names and passwords.