Authenticated mode of Trivium

Trivium is one of the finalists of the eSTREAM project in hardware category. It is well known for its performance and security. A number of attacks have been published against the reduced versions of Trivium but the original Trivium is still unbroken. It is best suited for resource-constraint environments like RFID and wireless sensor networks. There is a need to introduce the authenticated mode of Trivium because without authentication, the confidentiality service is not enough for the security of the cryptosystem. In this research, the authentication mechanism of Grain-128a has been extended and implemented for Trivium. ETM approach has been followed instead of Grain-128a's MAE. A comparative analysis has also been performed for all of the three approaches MTE, ETM and MAE. Indirect message injection technique has been used in the authentication mechanism. Single key mechanism has been used for both encryption and authentication. Software as well as micro-controller implementations are carried out and performance analysis has been performed. Finally, the throughput rate has been calculated for the authenticated mode of Trivium and compared against the normal mode.