Really nice work, Hannes.  Thank you.

Eliot

> On 21 Sep 2020, at 11:20, Hannes Tschofenig <hannes.tschofe...@arm.com> wrote:
> 
> Hi all,
> 
> working on draft-ietf-uta-tls13-iot-profile, Thomas and I have been looking 
> at the implementation status of TLS/DTLS extensions on embedded devices. Here 
> is what we found out looking at various popular stacks. There are lots of 
> features in prototype status and we have not taken those into account.
> 
> "red" means not implemented, "green" refers to an implemented feature, and 
> "white" is an indication that we didn't have a chance to figure out whether 
> the feature is supported or not because it was not described in the 
> documentation.
> 
> In a nutshell, it is fair to say that certificate and PSKs are well 
> supported. Raw public key support is also available with a number of 
> implementations.
> What is a bit disappointing is that many extensions targeting IoT 
> optimizations are not implemented. It is hard to say why. Maybe companies 
> don't feel a need to use these optimizations, maybe the optimizations aren't 
> good enough, or companies are unaware of these RFCs.
> 
> Please let us know if we got something wrong or if we forgot your 
> implementation.
> 
> Ciao
> Hannes
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