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Terminal Password Protection

A universal security system that can lock/unlock a terminal, to deny or grant access to certain commands. Very situational - only useful if you have two sets of terminal commands: Those that should be available for the crew at all times, and those that should be restricted to higher-ups. In most cases, locking a terminal can be done much more easily (id-restricted button and relay).

Has a command to set a new password, an autolock feature (can be configured/disabled), and a password reset button (only works with captain's id card).
The terminal can still be used to send commands meant to be available for everyone (though some minor editing is needed to avoid a false "Access denied" message for those, instructions for that are included).

Contains explanatory labels and an example setup (access control for a navigation terminal and a self-destruct sequence).

How the commands work:
lock - will lock the terminal and erase the screen.

unlock <password> - will grant access to password-protected commands and erase the screen to hide the password you just entered.

setpwd <new_password> - will set a new password (it will be visible until you lock the terminal again, after which there is no way to retrieve the new password in case you forget it).

autolock <5...60> - enter the time in seconds after which an open terminal will lock itself automatically (the lowest possible time is 5 seconds, to prevent situations where it's impossible to access it again). Alternatively, enter "autolock 0" to disable this feature.

setfreq <0...9999> - Optional command. The system can't be used to control access to radio chat, but with this command you can set a (secret) channel for commands that can be voice-activated but shouldn't be available to everyone.

Reset Button:
If the captain has an unfortunate "diving accident", his id card can be used to set the password back to default (default password should be made available somewhere on the sub).