How about PoS then? * Lock up, say, $5, in anonymous cryptocurrency like Monero * When visiting example.org, sign a message "example.org <current timestamp>" with your private key, and include the signed message in a…
How about PoS then? * Lock up, say, $5, in anonymous cryptocurrency like Monero * When visiting example.org, sign a message "example.org <current timestamp>" with your private key, and include the signed message in a…