Caution: a “public” blockchain doesn’t lack for data confidentiality But public is idea where disparate actors want to transact in transparent, trustless manner …& can be publicly verified w/o Record added to blockchain… …exists confidentially… sacrificing confidentiality • When a record is added to blockchain, the • On a public blockchain, anyone can see • Info verified by comparing shape (where impression or shape is added…not the data the entry exists, but cannot access the data is known) to one on the blockchain • The resulting shape is public…not the data details • An exact match verifies info is identical Based on a cryptographic proof protocol, which offers a way for a “prover” to convince a “verifier” that a statement about a secret is true without revealing the secret publicly