METHOD TO UPGRADE A TEE TRUSTED APPLICATION TO A SERVER MODE

The present invention relates to a method to upgrade a Trusted Application (TA) in a Trusted Execution Environment (TEE) compliant to a Trusted Execution Environment standard to an as-a-server functioning by running, inside the Trusted Execution Environment (TEE), each instance of a Multi Instance/Single Session Trusted-Server Trusted Application (TS) compliant to the TEE standard in an infinite state-full loop polling a session of a Single Instance/Multi Session Trusted-Pipe Trusted Application (TP), the single session of each of the instance of the Trusted-Server Trusted Application (TS) being adapted to perform a task as a server, said Trusted-Pipe Trusted Application (TP) being further polled by the Customer Application (CA) and opening session depending on command coming from the Customer Application (CA).