I'm not a security expert, so I'll turn most of my time over to Chris. I have heard positive reflections on the Estonian model and I have not heard the security concerns. The way it's described, it makes sense, but I haven't heard of any issues. It's most often the example that comes up in a positive light and is starting to be studied. It may just be a test of time to make sure it's the right one, but I'll let Chris weigh in.
On February 5th, 2019. See this statement in context.