@rixx rixx: The link you posted is inaccessible from some users.
You better post alternative website next time? So my friend can visit the website

Alternative:
https://web.archive.org/web/https://www.openbsd.org/papers/bsdcan-signify.html

Cloudflare domain: openbsd.org
Why: https://notabug.org/themusicgod1/cloudflare-tor