Category: Zcash (ZEC)

Pay-to-sudoku Revisited

Last year, I created a project called pay-to-sudoku which was the world’s first implementation of a zero-knowledge contingent payment (ZKCP). ZKCPs were invented in 2011 by Gregory Maxwell, and are a clever cryptographic trick that allows people to trade information and value atomically over a blockchain. Gregory was also kind …

This article was originally published on: Zcash blog on