Information security method and apparatus

A device for protecting secured areas in a computer system, said computer system comprising a computer and a storage unit, said storage unit including a first storage area and a second storage area, the device comprising:

• a first communication interface for connecting to a first network;
• a second communication interface for connecting to said computer;
• a first input-output (I/O) interface for connecting to said storage unit;
• a second input-output (I/O) interface for connecting to said computer;
• and
• a managing controller connected between said first network and said computer via said first and second communication interfaces, said managing controller also being connected between said storage unit and said computer via said first and second I/O interfaces,
• said managing controller configured to provide said computer system with a selection between at least two predetermined modes providing non-overlapping physical configurations of said computer system,
• wherein, in a first mode, said managing controller connects said computer to said first storage area and to said first network and disconnects said computer from said second storage area, and in a second mode, said managing controller connects said computer to said second storage area and disconnects said computer from said first storage area and from said first network, and
• wherein said managing controller detects any reset signal followed by a command to operate according to a selected mode.