Two balls and the colour-blind friend

Zero-knowledge proof cryptography is something that I have lots of interest in. It’s a type of cryptography that allow a prover to prove to a verifier that a certain statement is true, without revealing anything else apart from that statement. ZK-SNARKS, a variant of zero-knowledge proofs, is being built into Ethereum (it already exists in zCash). In this blog post I’ll refer to a very simple story that explain how zero-knowledge proofs work. Continue reading “Two balls and the colour-blind friend”

Building dapps on Ethereum – part 6: deploying a private testnet

When developing dapps and smart contracts, it’s of great importance to have a good development workflow and to go through the right amount of testing and validation. In previous posts I’ve explained how to setup a local blockchain node for testing. While the ultimate goal is to deploy your dapp to one of Ethereum’s test networks, and then the main network, it’s very useful to be able to run your own full private network. This can be used for internal testing, verification and simulation, within your own team or company. In this blog post we’ll cover just that — how to deploy a private testnet and the basic components involved. Continue reading “Building dapps on Ethereum – part 6: deploying a private testnet”