Introducing Secure Element Token With USB Wi-Fi Bluetooth Triple Communication Interfaces

This paper introduces an innovative secure element token, which supports three communication interfaces, USB, WiFi, and Bluetooth. The token is built with a system on chip (SoC) module including FLASH memory, and a secure element (javacard) with a mini SIM form factor. The secure element is managed via ISO7816 five wires interface, thanks to an original library. We present use cases for each communication interface. Serial USB is used to upload software in the SoC, and thereafter to download javacard application in secure element according to Global Platform (GP) protocols. Wi-Fi enables internet access to secure element thanks to TLS1.3 server running within secure element. Bluetooth allows interactions with mobile applications, such as Bluetooth terminal, which use the SoC to build Ethereum transactions signed by secure element.