A cryptographic system includes a memory device and a processor. The probe further includes a cutting member 120 disposed within the sleeve 102, and having a circumferential cutting edge 122 at its end. A sample of a rock of the sedimentary series is then taken at a depth close to the surface, such that said rock has not been subjected to any biodegradation, and amounts of each bioreactive structural unit present in this sample are determined. The event processing server may receive event information generated by the event monitoring agents that describe events occurring at the event generators.