Abstract: Method and device for destruction of objects stored in an alarm-protected security container. There is used a destructive agent which is distributed over the object or objects when the alarm is triggered, so as to mark and/or destroy the object/objects. There is also used a destructive device which includes an explosive agent that acts at least partially on the object/objects when the alarm is triggered. The device includes a channel whose opening faces towards the object/objects. The destructive agent is encapsulated in the channel and the explosive agent is disposed adjacent the channel. The channel has a generally U-shaped cross section and includes end-walls.