System for proof that the previous comment on an anonymous public thread using a hash
- The use comments and left a hash 'proof' hased using a secret passphrase.
- At the next comment, the use left the new proof and the passphase for 'solve' the previous hash, demostrating that is the same user that commented previously.
All the data, hash and passphrase is on a single payload that any user can compare with the payload of the previous comment for check user authority.