Enigma is a decentralized data marketplace, that guarantees the privacy of their users' shared data cryptographically. Enigma’s computational model is based on an optimized version of secure multi-party computation, backed by a verifiable secret-sharing scheme. For storage, Enigma uses a modified distributed hashtable for holding secret-shared data. An external blockchain is utilized as the controller of the network. It manages access control, identities and serves as a tamper-proof log of events. Security deposits are required and fees are charged in order to incentivize operation, correctness and fairness in the system. ENG is an Ethereum-based ERC 20 token that serves as currency on Enigma's network.