alt Hacker NewsFYI in case the author is reading, https://www.cs.cmu.edu/~nihars/preprints/greCAPTCHA.pdf is a dead link.
EDIT: I found a live link on arxiv https://arxiv.org/html/2609.20481v1
FYI in case the author is reading, https://www.cs.cmu.edu/~nihars/preprints/greCAPTCHA.pdf is a dead link.
EDIT: I found a live link on arxiv https://arxiv.org/html/2609.20481v1
In June 2026 I proposed a CAPTCHA for scientific publications
https://chorasimilarity.wordpress.com/2026/06/13/a-captcha-f...
At the moment this was seen as a tongue in cheek proposal.