On October 30, “Big Four” accounting firm EY announced a tool that it said would bring private transactions to ethereum – that’s the public blockchain, not a permissioned, enterprise version of the network.
According to the firm’s press release, its EY Ops Chain Public Edition prototype (“with patents pending”) is the “world’s first” implementation of zero-knowledge proof (ZKP) technology for ethereum.
A ZKP is a cryptographic technique which allows two parties to prove that a secret is true without revealing the actual secret. In the case of cryptocurrencies and blockchains, this is most often data about transactions.
The firm’s privacy prototype is aimed to allow companies to create and sell product and service tokens on the public ethereum blockchain while keeping access to their transaction records private. The firm said that the prototype supports payment tokens that are “similar” to ethereum’s ERC-20 and ERC-721 token standards.
“Private blockchains give enterprises transaction privacy, but at the expense of reduced security and resiliency”, – said Paul Brody, EY’s global innovation leader for blockchain. – “With zero-knowledge proofs, organizations can transact on the same network as their competition in complete privacy and without giving up the security of the public Ethereum blockchain.”
Also included with the ZKP prototype is another solution – EY Blockchain Private Transaction Monitor – that captures transaction history.
The privacy offering is slated for production release in 2019, according to EY.