Last December, we reported that Amazon, Apple, Google, and the Zigbee Alliance had partnered to create Project Connected Home over IP (CHIP) working group with the goal of developing a royalty-free, secure Smart Home standard to increase compatibility among products over WiFi, Ethernet, Bluetooth LE, Cellular, 802.15.4 and others community protocol.
Infineon has now unveiled OPTIGA Trust-M evaluation kit for Raspberry Pi designed to experiment with Connect Home over IP standard and comprised of Infineon Shield2Go HAT/adapter board, and OPTIGA Trust-M Security Shield2Go board equipped with Infineon OPTIGA Trust-M “Common Criteria Certified EAL6+” security controller.
The Shield2Go adapter just re-routes the 40-pin Raspberry Pi header I/Os to sockets compatible with Infineon boards and a prototyping area. So the most important part is OPTIGA Trust-M Shield2Go which supports the following:
- X.509 certificates
- Device authentication
- Cryptographic support
- ECC NIST curves up to P-521, Brainpool r1 curve up to 512
- RSA up to 2048
- AES key up to 256, HMAC up to SHA512,
- TLS v1.2 PRF and HKDF up to SHA512
- Key management
- Secured data storage up to 10kB
- Encrypted I2C between Host and OPTIGA Trust M
- Hibernate for zero power consumption
The kit then relies on the Raspberry Pi 4/3 SBC’s WiFi and Bluetooth LE connectivity to provide a secure Smart Home system compatible with Connected Home over IP standard for wireless alarm systems, automation and secured monitoring, smart lighting, and more.
Infineon also released software, examples, a Getting Started guide on Github that mostly target another OPTIGA Trust M evaluation kit based on the company’s XMC4800 Relax kit (Arm Cortex-M4) with supports for MikroElektronika Click and Adafruit’s FeatherWing add-on boards, but I suppose it can be easily adapted to the Raspberry Pi kit.
I could not find OPTIGA Trust-M evaluation kit for Raspberry Pi for sale just yet, but for reference, the Cortex-M4 kit is sold for $115 on distributors such as Newark. If you intend to use OPTIGA Trust M security chip in your design, note that the company appears to sell different versions with the lifetime for Industrial Automation and Infrastructure being 20 years and 15 years for other application profiles. More details may be found on the product page.