This video provides a quick demonstration of using Zero Knowledge Proof to verify that person is 21 years or older without accessing their date of birth in plain text. The actual zk-SNARK proof is created offline but validated on the Ethereum blockchain using Solidity code. A full end-to-end scenario is available as a hands-on-lab at: https://github.com/razi-rais/blockchain-workshop/tree/master/zk-SNARKs Follow @CH9 Follow @MSFTBlockchain