LetsTrust TPM for Raspberry Pi

LetsTrust TPM is an easy-to-use TPM (Trusted Platform Module) solution for the Raspberry Pi, based on the Infineon Optiga ™ SLB 9670 TPM 2.0. A hardware TPM can be used in a variety of ways, including for authentication/signatures, storing crypto keys and much more. The module can also be used as a True Hardware Random Number Generator (TRNG) if you need a good source of randomness! LetsTrust TPM uses the SPI interface to communicate with the Raspberry Pi. It is compatible with all Raspberry Pi models - Model B, Model A, Pi Zero and Pi400 (with cable). It has a compact footprint allowing the remaining GPIO pins to be used. 2x5 pins from pin 17 to pin 26 are occupied by LetsTrust. Note: Raspberry Pi not included Specifications TPM features

* Infineon Optiga ™ SLB 9670 TPM 2.0 * Compliant with TPM Specification 2.0 Rev. 01.38 * Firmware> = 7.85 * TRNG (Real Random Number Generator) - True Hardware Random Number Generator Design & interface

* Interface to the Pi: SPI * Compatible with all previously released Raspberry Pi models (including Pi 3, Pi Zero, etc.) * Compact size thanks to 2x5 pin headers, so the remaining GPIO pins remain freely available * Can be firmly soldered with Raspberry Pi pins * Fits into common standard housings Software support

* From Raspbian Stretch upwards, with kernel 4.14.85 built-in support with a device tree overlay * Built-In Support for Windows 10 IoT (on Pi 2, 3, 3B +) Package Contents

* 1x LetsTrust TPM module * 1x 8-pin header (installation aid to determine the correct position for the TPM module without counting) Resources

* TPM2 software * ELTT2 Infineon Embedded Linux TPM Toolbox 2 for TPM 2.0 - test, diagnostics, etc. for the Infineon TPM chip * Script examples for getting started & installing the TPM 2.0 tools * Further information and links can be found at www.LetsTrust.de

Installation Step 1: Attach the 8-pin header to pin 1 of the Raspberry Pi The pin header has pins at the top that can be used directly for other projects if necessary. Attaching the 8-pin header is used to determine the correct pins for attaching the LetsTrust TPM module and is not required for its function. Step 2: Plug in the LetsTrust TPM module The module is plugged directly next to the 8-pin header. Notes

* Software installation necessary to use the module - see letsTrust.de from Rasbian with Kernel 4.14.85 DTO support * The module also works with Windows 10 IoT Core (Pi 2, 3, 3B + supported) * The module is delivered with firmware> = 7.85