[dokument]

The first step to IT security is physical security.

[kmicklas]

And when all your physical security tools are electronic the first step to physical security is IT security :)

[TeMPOraL]

It generalizes to national security as well.

https://xkcd.com/898/

[flukus]

Also the last step, you can't defend against physical access, the best you can do is make data unreadable to anyone unauthorized.

[ryanlol]

Since when does the lack of perfect defenses render something indefensible?