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
ARPA is a Secure Computation Network Compatible With Blockchains They propose a blockchain-based secure computation network of Multi-party Computation (MPC). ARPA cryptographically enables private smart contract, unprecedented data-at-use privacy protection, as well as scalable computational sharding.