[zenon]

The Coinhive script mines Monero: https://coinhive.com/ . It's been a while since JavaScript Bitcoin mining was feasible :)

[rileyphone]

I really like the idea of this as a captcha alternative, especially with the "train our neural nets" approach google has been taking recently with them.

[zeusk]

How would coinhive work as a captcha alternative? There is no human involvement in mining, is there?

[discreditable]

It works as a rate-limiter in a way. If you're interested look into HashCash as proposed to combat email spam: https://en.m.wikipedia.org/wiki/Hashcash

[zeusk]

rate-limiting is not what captcha does, that's for DDoS protection and even in that scenario I feel HashCash and crypto mining is a very terrible idea.

[discreditable]

Hence "captcha alternative" and not "alternative captcha".

[zeusk]

Wouldn't "captcha alternative" imply that the said alternative is a replacement for captcha and has similar functionality?

[diggan]

Not saying it would be a good idea but something like "Please wait until your CPU have done enough amount of work before submitting this comment"

[misterdata]

This exists: https://github.com/pixelspark/webpow

[brndnmtthws]

The unwashed masses can't understand the difference between different coins, so you might as well call everything Bitcoin.

[em3rgent0rdr]

Most of these crypto currency exchange are derived from bitcoin's codebase (or at least from bitcoin's white paper) so from that perspective I don't consider calling these other crypto's as "bitcoin" to be incorrect, just not specific. I could imagine that maybe could use the distinction of capital Bitcoin to refer to the specific blockchain while lowercase bitcoin to refer to any Bitcoin forks.