Added: 05/15/01
1. A trusted system allows system auditing to be turned on.
 System auditing enables the ability to trace every system call
 issued by each user on the system. Non-trusted systems run
 with system auditing disabled.
2. Trusted systems have improved password management.
 Below is a list of password management features:
 a. Specification of a grace period and expiration period for
 passwords.
 b. The ability to specify system-wide password aging.
 c. The ability to specify an absolute account life.
 d. The ability to disable accounts after repeated login
 failures.
 e. Passwords lengths of up to forty (40) characters.
 f. The ability to access a random password generator.
3. Trusted systems have additional login restrictions, while
 non-trusted systems do not. Below are the features of
 trusted system login restrictions:
 a. In addition to account disabling, the account may also be
 locked.
 b. Setting accounts to be accessed only at certain times of
 the day.
 c. The ability to specify account location access. In other
 words, account access at specific devices, workstations,
 and so on.
 d. The ability to specify a single-user boot password.
 Note: These login restrictions are NOT available on
 NON-TRUSTED systems.
4. A trusted system has shadowed passwords, while a non-trusted
 system does not have shadowed passwords. Shadowed passwords
 are kept in locations other than /etc/passwd. This prevents
 users from viewing the /etc/passwd file and determining which
 accounts do not have passwords. This also prevents hackers from
 running "password cracker programs" against passwords in the
 /etc/passwd file.
For more information, please refer to the following document:
 "Administering Your HP-UX Trusted System"
The document is located at the following web site:
 o <http://docs.hp.com/en/B2355-90121/>
Locate the "Description of the HP-UX Trusted System" section in
the left menu. The following two pages contain more information:
 o What is a Trusted System?
 o What is C2-Level Trusted Mode?