A method and device for securing a removable Attached Computer Module
("ACM") 10. ACM 10 inserts into a Computer Module Bay ("CMB") 40 within a
peripheral console to form a functional computer such as a desktop
computer or portable computer. The present ACM 10 includes a locking
system, which includes hardware and software 600, 700, to prevent
accidental removal or theft of the ACM from the peripheral console. While
ACM is in transit, further security is necessary against illegal or
unauthorized use. If ACM contains confidential data, a high security
method is needed to safeguard against theft.