[nibbleshifter]

It used to be fairly common practice for skilled hackers to patch the way they got in, to avoid their borrowed systems from being invaded by skids.

[ComputerGuru]

This is different, more like putting a trap door in the ceiling and then patching all the leaks in the roof so that the homeowner won’t need to climb up on to the roof to fix those themselves and in doing so stumble on your trap door.