You can turn Anubis into Proof of Storage by appending large amounts of random data to the session cookie and then hashing it on each request. Combined with per-session-cookie limits, you can effectively force the LLM bots to store all the data you want if they want to scrape your site.

Maybe suckerpinch can work it into a sequel to Harder Drive: Hard drives we didn't want or need[0].

[0] https://www.youtube.com/watch?v=JcJSW7Rprio

Great clip! I love the idea of making internet miscreants reluctantly store your data!

Slightly more seriously though, I think for the Proof of Storage idea to pack enough punch to be a deterrent, you'd need the cookies to be quite large. Is there a way to avoid needing them to send you all the bytes each time? Because that will cost you (the site owner) too.

I had the idea of sending requestors a challenge like "Flip the bit at position i of the large chunk of stored data, hash the result and include the hash in your headers". Instead of the site owner keeping the full stored data, they would just keep the RNG seed used to generate it -- this saves on storage, though it still requires them to do the same time-consuming hash computation done by the requestor.

Anubis remains effective because the token is subject to a rate limit and you could additionally limit token lifetime to some maximum number of requests if you wanted to.

All of these factors (total requests, rate of requests, associated IPs, associated browser fingerprints) tie in to detecting bad players, who should receive more frequent and larger challenges.