What's better?
Hashcash is interesting, but it's probably not applicable to every scenario and it hasn't seen much adoption. There might even be a bit of a stigma now around proof-of-work algorithms because of cryptocurrency mining.
Hashcash is interesting, but it's probably not applicable to every scenario and it hasn't seen much adoption. There might even be a bit of a stigma now around proof-of-work algorithms because of cryptocurrency mining.
I'll take the PoW captcha any day.