I am thoroughly confused. When I click on the link above, it takes me to an Electronic Frontier Foundation donation page. If I go to dzombak.com I get to the home page of Chris Dzombak. Then going to the blog, there is a blog post titled "Securing my personal SSH infrastructure with Yubikeys" which takes me to the article which I believe is the one posted, which appears to be identical to the link above. What the hell is going on???