Abstract: A secure system for authenticating the identity of ADS-B systems, including: an authenticator, including a unique id generator and a transmitter transmitting the unique id to one or more ADS-B transmitters; one or more ADS-B transmitters, including a receiver receiving the unique id, one or more secure processing stages merging the unique id with the ADS-B transmitter's identification, data and secret key and generating a secure code identification and a transmitter transmitting a response containing the secure code and ADSB transmitter's data to the authenticator; the authenticator including means for independently determining each ADS-B transmitter's secret key, a receiver receiving each ADS-B transmitter's response, one or more secure processing stages merging the unique id, ADS-B transmitter's identification and data and generating a secure code, and comparison processing comparing the authenticator-generated secure code and the ADS-B transmitter-generated secure code and providing an authentication signa

Abstract: This invention provides a hologram thermal transfer sheet that can realize thermal transfer treatment with high efficiency. The thermal transfer sheet comprises a base material sheet and a transparent transfer layer provided separably on the base material sheet, characterized in that a hologram layer is provided on at least a part of the transparent transfer layer. There are also provided a process for producing the thermal transfer sheet and an image formed material produced by the transfer of this thermal transfer sheet.