LetsTrust TPM for Raspberry Pi

LetstrustSKU: 104062
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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

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

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