Tag Archives: Confidentiality


The Economist reports about a new digital currency platform, Zcash. The platform could handle more transactions than for example, Bitcoin. The open-source project backed by outside investors offers confidentiality:

Bitcoin obscures the identity of currency owners, but the “blockchain”, the ledger that keeps track of all the coins, is open and can be analysed to see the flows of funds. This is a serious barrier for banks: blockchains could reveal their trading strategies and information about their customers. Zcash, by contrast, shields transactions from prying eyes with a scheme based on “zero-knowledge proofs” (hence the “Z” in its name). These are cryptographic protocols proving that a statement (who owns coins, for instance) is true without revealing any other information (how many and where the money came from). And it is by selling this technology—called “zk-SNARK” (don’t ask)—to banks that Zcash, the company, wants to earn its keep.