Electronic cylinder lock and computer security system

A security lock for a gaming machine or other device, said lock having a plug rotatable in a cylinder between latched and unlatched positions, at least one rolling member which at the latched position is radially displaceable within aligned plug and cylinder recesses between an outer locking position wherein said rolling member extends across a shear face separating said plug and cylinder to hold said plug in said latched position and an inner unlocked position wherein said rolling member is substantially within said plug recess and plunger means movable axially within said plug between a first position wherein said rolling member is retained in said locking position and a second position in which said rolling member is movable inward from said locking position to said unlocked position to allow rotation of said plug from said latched to said unlatched position, said plunger means being axially opposed to a first key receiving face of the plug and said plunger means being movable by a solenoid against the biasing force of a spring.