Aleph Zero is designed to provide security, scalability, and privacy. It overcomes challenges associated with blockchain network's security, scalability, decentralization, privacy, as well as user and developer experience. It uses a novel AlephBFT consensus protocol, which offers a high level of security, and is capable of efficient scaling on both the consensus protocol level and as a smart contracts platform. For privacy, Aleph Zero uses ZK-SNARKs for private computation on user-owned data records and adds the concept of 'global secrets' controlled by smart contracts for private multi-user interaction.