> I don't think this advice is really detailed enough to cover the breadth of the embedded space and/or comes with enough caveats about lack of writeable storag

> I don't think this advice is really detailed enough to cover the breadth of the embedded space and/or comes with enough caveats about lack of writeable storage and reused keys. I believe the link I gave is. I highly recommend you read it. It's from a trustworthy author (Daniel Bernstein): https://blog.cr.yp.to/20170723-random.html https://blog.cr.yp.to/20170723-random.html