Tampering with an assembly that includes an integrated circuit is detected by measuring a change in at least one property of a conductive molding formed over at least a portion of the integrated circuit. For example, the conductive molding can be a mixture of resin with conductive powder and/or fibers....http://www.google.es/patents/US7710286?utm_source=gb-gplus-sharePatente US7710286 - Intrusion detection using a conductive material
