Access to all Starfleet data is highly regulated. A standard set of access levels have been programmed into the computer cores of all ships in order to stop any undesired access to confidential data. Security levels are also variable and task-specific. Certain areas of the ship are restricted to unauthorized personnel, regardless of security level. Security levels can also be raised, lowered, or revoked by Command personnel. The main computer grants access based on checks to the individual user, including face and voice recognition in conjunction with a vocal code as an added level of security.

Security levels in use:

Level 11 - Flag Officers Level 10 - Commanding Officer / Captain and Above
Level 9 - Executive Officer / First Officer
Level 8 - Commander / Lieutenant Colonel
Level 7 - Lt. Commander / Major
Level 6 - Lieutenant / Marine Captain
Level 5 - Lt. Junior Grade / First Lieutenant
Level 4 - Ensign / Second Lieutenant
Level 3 - Non-Commissioned Crew (Non-Department Heads)
Level 2 - Civilian Personnel
Level 1 - Open Access (Read Only)

Note: Security Levels beyond current rank can and are bestowed where, when and to whom they are necessary.