Secure data transfer over NFC: ST25DV-I2C dynamic tag and STM32Trust

This solution establishes a Secure Transfer Channel (STC) over NFC between a microcontroller and a smartphone application.

An ST25DV-I2C dynamic NFC Tag IC interfaces between an STM32 microcontroller and an NFC compatible Android or iOS mobile device to provide authorized access and control of an industrial, home appliance or consumer system and to protect data with high encryption security.

The NFC Tag supports accelerated communication rates with a Fast Transfer Mode buffer between the radio interface and the I2C serial interface for the MCU. The Secure Transfer Channel initiates key pairing for mutual authentication between the mobile application and the microcontroller before proceeding with encrypted communications over NFC.

The STM32L476RG MCU running the X-CUBE-SBSFU secure boot and secure firmware update software implements a series of start-up and runtime protections for the sensitive authentication data and cryptographic libraries required for a viable secure communication application.