LetsTrust

Hello everyone,

and the second news today: The TPM Software Stack (TSS) now also supports the LetsTrust-TPM2Go as TCTI device with the latest release!

https://github.com/tpm2-software/tpm2-tss/blob/4.1.1/doc/tcti.md

What's new about this, the LT-TPM2Go has been working with the TSS for over 6 months?
That is correct, but only if you have rebuilt the TSS from the master.
In the near future, everything will be easier with the current release, then these three steps will be sufficient (also applies to the SPI-based LetsTrust-TPM).

# install all tpm2 relevant software and tools
sudo apt --yes install libtss2-* tpm-udev tpm2-abrmd tpm2-tools

# Add the current user to group tss (with privilege to access the TPM)
sudo usermod --append --groups tss $(whoami)

# Reboot for group change to become effective
sudo reboot

You see, it goes on and on with the TPM!

Bye, for now

Paul

Hello to everyone,

I have a product change notification for you today! (PCN)

LetsTrust-TPM gets a new chip. The usual Infineon quality remains and from now on the SLB9672 FW15.23 will be used!

What will change? Basically nothing for the user, the config.txt change remains as before, the devicetree overlay is loaded via -> dtoverlay=tpm-slb9670. Because the SLB9672 is 100% driver compatible with the old overlay (yay!)

We were also able to retain the layout, because the SLB9672, like the SLB9670, follows the specifications of the TCG (Trusted Computing Group) regarding the pinout and the package.

Only the TCG Spec version changes, here we have to take what we get from Infineon. The latest firmware version is based on the specification revision Rev.:1.59 and no longer on Rev.:1.38 as before (higher is better).

This change is effective as of Monday, May 13th. All LetsTrust-TPMs ordered from then on will be on the latest possible version!

Bye for now,

Paul