RealTract main objective is to create an improved version of Ethereum’s smartcontract- 2.0 SMARTCONTRACT : more functional, bridging blockchain and conventional technology to create true value. RealTract is a 4.0 BLOCKCHAIN with advanced technology that solves the issue of scalability and confirmation time of the existing blockchain technology
BitcoinZ is based on Bitcoin + zkSNARKs and is a decentralized CDD.