this post was submitted on 07 Jul 2025
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Exactly. It's called proof-of-work and was originally invented to reduce spam emails but was later used by Bitcoin to control its growth speed
It's funby that older captchas could be viewed as proof of work algorithms now because image recognition is so good. (From using captchas.)
it wasn't made for bitcoin originally? didn't know that!
Originally called hashcash: http://hashcash.org/
TIL
you know it's old when it doesn't have ssl