The latest video uploaded at the time of this post to the Up and Atom YouTube channel is about zero knowledge proof. It is interesting that one of the first real world applications of zero knowledge proof is being used in blockchain technology.
As the video points out when Satoshi Nakamoto first created bitcoin there was a choice to be made of privacy vs. trust. Consensus trust was chosen and a record of transactions between wallet addresses is visible on a public ledger limiting anonymity.
Cryptocurrencies like Firo are implementing zero knowledge proof so blocks in a blockchain can be verified without revealing much transaction details.
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