Richard K Miller dot coooooooooom MicroID Plugin for WordPress
richardkmiller.com/164/microid-plugin-for-wordpress
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
I recently learned about MicroID, a microformat for verifying ownership of content on web pages, from a post on Phil Windleys blog. MicroID, which is a simple hash of an email address and a URL, can be used to claim ownership of a blog, a blog post, or