Dear Mbed TLS users,

Mbed TLS has contained the reference implementation of the PSA Crypto API since the early days of the standard. This implementation was experimental at first, but over years of development it reached maturity, and the experimental status was removed three years ago (in version 3.6.1.).

Shortly after that, in 2022, the TF-PSA-Crypto repository was created just for the PSA Crypto API implementation to make it more accessible for users only interested in that. This repository was only a mirror of the main one and the development of the PSA Crypto API implementation remained integral part of Mbed TLS.

In the background, work has been started to make this repository the place where the development of the PSA Crypto API reference implementation happens. This work has finally been completed and from now on TF-PSA-Crypto is ready to receive contributions, bug reports and enhancement requests. TF-PSA-Crypto will now be the development repository for the PSA Crypto reference implementation.

Mbed TLS will continue to rely on TF-PSA-Crypto and will be using it as a submodule.

Many thanks,

Janos Follath

Mbed TLS developer