The last three paragraphs are like, "Forget the headline and the rest of the article, this tech actually sucks and we plan to stop using it." Confusing.
Congratulations! We’ve re-invented Kerberos after 30 years.
Are we going to give up on an open internet and just SSH into a proxy that can deal with all of this overhead?
Cloudflare talks a bit more about replay attacks and mitigation in their blog.