THID, the Ultimate Outcome of RFID: Terahertz Identification and Authentication covers the burgeoning domain of the terahertz (THz) domain and its promising future in the electromagnetic spectrum for applications in telecommunications, medicine and the security industries. It describes a novel tag used in the THz frequency region that is complementary to the RFID solutions that are now commonly used in an effort to highlight the increased level of security in the encoded information. These pure dielectric tags, in which the information is encoded in the volume, is very difficult to analyze and counterfeit.