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Joy-it Raspberry Pi TPM module - RB-TPM-MODUL

Not AvailableJoy-it Raspberry Pi TPM module - RB-TPM-MODUL

Trusted Platform Module as a plug-in module for the Raspberry Pi. Uses SPI to communicate with the...

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Product Information

Full details

This Joy-it Raspberry Pi TPM Module is for users and developers needing enhanced security for their Raspberry Pi projects. Its key benefit is providing a hardware-based Trusted Platform Module for secure key storage and authentication. A potential caveat is its reliance on SPI communication and the occupation of specific GPIO pins.

All features

Model Part NumberRB-TPM-MODUL
BrandJOY-IT

Extended Product Information

FAQs

What is a Trusted Platform Module (TPM)?

A TPM is a specialized microcontroller designed to secure hardware through cryptographic keys. It provides hardware-based security functions like secure key generation, storage, and platform integrity measurement.

Is this module compatible with my Raspberry Pi model?

Yes, the Joy-it Raspberry Pi TPM module is compatible with all Raspberry Pi models, including Pi 1, Pi 2, Pi 3, and Pi Zero.

How do I enable the TPM on my Raspberry Pi?

You typically need to ensure you have a compatible OS (like Raspbian Stretch or later) and add `dtparam=tpm_spi=on` to your `/boot/config.txt` file, then reboot.

What does TRNG stand for and why is it useful?

TRNG stands for True Random Number Generator. It's useful because it provides unpredictable, high-quality random numbers essential for cryptography, secure key generation, and statistical simulations.

Will this module block other GPIO pins?

The module uses a 2x5 pin header which occupies pins 17 through 26. This means these specific pins are used, but the remaining GPIO pins are still accessible for other peripherals.

What versions of Windows does this TPM module support?

The module has built-in support for Windows 10 IoT.

Can I use this module for secure boot?

Yes, by leveraging the secure key storage and integrity measurement capabilities of the TPM, you can implement secure boot functionalities for your Raspberry Pi projects.

Troubleshooting

TPM module not detected by the Raspberry Pi

Verify the module is correctly seated on the GPIO pins. Ensure the SPI interface is enabled in `raspi-config` or `/boot/config.txt` (`dtparam=spi=on`). Check that the Device Tree overlay for the TPM is correctly added to `/boot/config.txt`.

Errors when trying to access TPM functions

Confirm you are using a compatible operating system version (e.g., Raspbian Stretch or newer with kernel 4.14.85+). Ensure the necessary TPM drivers are loaded. Consult system logs (`dmesg`) for specific error messages.

SPI communication conflicts with other devices

If another device uses the SPI bus, ensure the chip select (CS) lines are correctly managed. In some cases, you might need to reconfigure which SPI bus or pins are used if your system allows for it, or prioritize the TPM's access.

TRNG output appears non-random or is insufficient

Ensure the TPM module has been powered on and operational for a short period to allow the internal entropy pool to gather sufficient randomness. Verify that the correct TRNG interface is being accessed by your software.

Pros and Cons

Pros

  • Enhances project security with hardware-based encryption and key storage.
  • Provides a reliable source of true random numbers.
  • Compatible with a wide range of Raspberry Pi models.
  • Maintains access to most GPIO pins due to its compact design.
  • Offers straightforward integration with updated Raspberry Pi OS versions.

Cons

  • Occupies a specific set of GPIO pins (17-26).
  • Requires SPI communication, which may conflict with other SPI devices if not managed.
  • Requires software configuration and kernel support for full functionality.
  • Soldering may be required for a permanent, stable connection (on rev 2.0+).

Setup, Compatibility & Care

Compatibility:

This module is compatible with all Raspberry Pi models, including the Raspberry Pi 1, 2, 3, and Zero. It requires an operating system with kernel support for TPMs, such as Raspbian Stretch (kernel 4.14.85) or later, and the necessary Device Tree overlay enabled.

Setup:

  1. Physical Installation: Carefully align the 2x5 pin header on the TPM module with the corresponding GPIO pins (17-26) on your Raspberry Pi and press firmly into place. For rev 2.0 and newer, consider permanent soldering for a robust connection.
  2. Software Configuration: Ensure your Raspberry Pi is running a compatible OS version. You may need to enable the Device Tree overlay for the TPM. This often involves editing the `/boot/config.txt` file and adding a line like `dtparam=tpm_spi=on`.
  3. Verification: After rebooting, you can verify the TPM is recognized by checking system logs or using specific TPM utility commands (e.g., `tpm_tools` on Linux).

Care:

  • Avoid exposing the module to extreme temperatures or moisture.
  • Handle the module with care to prevent static discharge damage.
  • Ensure a stable power supply to your Raspberry Pi to maintain TPM operational integrity.