A vehicle headlamp includes a light source, a reflector, a projection lens, and a shade. A battery-powered high decibel piezo siren activates when any intrusion occurs. Multiple references can be assigned to each node, thus guiding a user of the system to multiple other nodes, and multiple references can hold the same address, so that multiple nodes can have references pointing to the same node. This probe lightly contacts the upper stack surface and detects sheet curl especially on the edge portions of the stack. Each slice is sent to respective further devices accessible by the server such that no single further device receives sufficient slices to reconstruct the encryption key.