LetsTrust TPM – Trusted Platform Module for Raspberry Pi

The LetsTrust TPM is an easy-to-integrate TPM security solution for Raspberry Pi , based on the Infineon Optiga™ SLB 9672 TPM 2.0 . As a dedicated hardware TPM, it enables the secure storage of cryptographic keys and the execution of security-critical operations directly on the device.

A TPM (Trusted Platform Module) is a specialized security chip used for authentication , digital signatures , secure boot , and the secure management of cryptographic keys , among other things . Unlike software-based solutions, a hardware TPM offers a significantly higher level of security.

Additionally, the LetsTrust TPM can be used as a True Hardware Random Number Generator (TRNG) – ideal for applications that require a high-quality source of true random numbers.

High compatibility & easy integration

The LetsTrust TPM communicates via the SPI interface and is compatible with all Raspberry Pi single-board computers , including:

Raspberry Pi 5*, Raspberry Pi 4, Raspberry Pi 3 / 3B+, Raspberry Pi 2 / 1
Raspberry Pi Zero
Raspberry Pi 400 (with adapter cable)

Thanks to its compact 2×5-pin footprint (pins 17–26), other GPIO pins remain fully usable. The module fits into common standard enclosures and can optionally be permanently soldered .

* Note for Raspberry Pi 5: When using a standard cooling solution, a stacking header is also required.

Technical data

TPM Features:

Infineon Optiga™ SLB 9672 TPM 2.0
Compliant with TPM Specification 2.0 Rev. 01.59
Firmware ≥ 15.24
True Hardware Random Number Generator (TRNG)

Design & Interface:

Interface to the Pi: SPI
2×5-pin header (GPIO pins 17–26)
Compact size
Optionally, permanently solderable
Suitable for standard enclosures

Ideal for serial production projects & industrial applications

This product is available in batches of 100 pieces .
As an additional feature, you will receive Endorsement Key Certificates (EK certificates) with each batch , which are valid for:

unique device identification,
secure remote maintenance,
Trusted boot processes can be used.

Software support

Linux (e.g. Raspberry Pi OS, Ubuntu):
Integrated kernel support from version 4.14.85 onwards.
Support via Device Tree Overlay
Compatible with common ARM Linux distributions
Windows:
Built-in support for Windows 10 IoT Core (Raspberry Pi 2, 3, 3B+)

Available software:

TPM2 Software
ELTT2 Infineon Embedded Linux TPM Toolbox 2 for TPM 2.0 - Testing, diagnostics, etc. for the Infineon TPM chip

Script examples for getting started and installing the TPM 2.0 tools

Made in Germany – Development & manufacturing on site

The LetsTrust TPM board is entirely developed and manufactured in Germany . Development, design, and assembly are carried out exclusively by a regional partner in Bavarian Swabia .
Thanks to the local supply chain, sales have been stable and reliable since 2017.

“Made in Germany” here stands for safety, quality and long-term availability.