NFC I2C bridge tag for contactless authentication and secure configuration of IoT devices

The Infineon OPTIGA™ Authenticate NBT is an NFC Type 4 asymmetric tag with an I2C interface, providing a contactless bridge between an NFC reader such as a smartphone and a host microcontroller.

The Infineon OPTIGA Authenticate NBT is a high-performance NFC I2C bridge tag for secure human-machine interfaces (HMIs). The bridge tag enables fast, contactless NFC communication between an IoT device I2C interface and a contactless NFC reader such as a smartphone.

 

A Type 4 Tag certified by the NFC Forum, the OPTIGA Authenticate NBT can be used for single-tap authentication and secure configuration of an IoT device via an app on the user’s smartphone. The tag provides high security because of the Integrity Guard 32 security architecture. It also holds EAL6+ security certification for both the hardware and cryptographic libraries.

 

The NFC I2C bridge tag supports both symmetric and asymmetric cryptographic authentication, as well as pass-through and asynchronous data communication modes. These can be used for a variety of applications such as:

  • Secure configuration of electronic devices with no display
  • Activation of shared mobility vehicles
  • Passive commissioning of non-powered smart bulbs prior to installation
  • Data logging on patient health monitors

 

Featuring an 8 kbyte memory, the NBT offers ample space to store customer- and application-specific configuration information. High on-chip capacitance facilitates smaller antenna designs for an optimized bill-of-materials and tiny board footprint.

Features

  • Data rates:
    • Up to 848 kbits/s contactless (NFC)
    • Up to 1 Mbit/s on I2C interface
  • Security:
    • ECDSA-based asymmetric cryptography
    • AES-128-based symmetric cryptography
    • 32-bit password-based verification
  • 78 pF on-chip capacitance

Applications

  • Shared mobility products
  • Industrial equipment
  • Consumer electronics
  • Healthcare devices

Evaluation Kit

Part supported: OPTIGA™ Authenticate NBT

Kit part number: NBT2000A8K0T4KITV1TOBO1

BC_Infineon_OPTIGA-Auth-NBT-kit-Board

The OPTIGA™ Authenticate NBT development kit from Infineon is ideal for the quick and simple evaluation of the OPTIGA Authenticate NBT I2C NFC bridge tag using reference use cases available through GitHub.

 

The kit simplifies the development of custom applications using a PSoC™ host MCU based on the reference applications. After detaching the adaptor board, the shield may also be used separately for evaluation and application development using other MCU boards.

 

Features of the kit include:

  • Detachable shield sections
  • Default pre-tuned Class 5 antenna
  • Bundled pre-tuned Class 6 antenna
  • Antenna matching guide
  • Build, load, execute use cases
  • Easily adaptable reference use cases
  • Ready for embedded applications
  • Fully supported NFC Type 4 tag
  • Pre-loaded chip-unique certificates

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