The most common method of authentication is through usernames and passwords.

  • Weak authentication systems provide an invitation to attackers.
  • Static passwords, which never change, are the weakest kinds.

Choose an ever-changing password, which is valid only once.

  • These are the most secure passwords.
  • They are invalidated if captured.

Depending on the situation, however, strong passwords may not be needed and a static, or periodically changing password may be more practical.