Obscuro brings privacy to Ethereum. Obscuro is a decentralized, Layer-2 Rollup protocol for Ethereum. Designed to achieve privacy alongside cheap and fast transcations Obscuro solves a wide range of blockchain issues and opens up a new set of use cases. The design of Obscuro ensures that existing Ethereum apps can move over to Obscuro for virtually no cost. Any developer familiar with Ethereum can build privacy-preserving apps on Obscuro that benefit from the adoption, legitimacy, security, developer tooling and liquidity of the entire Ethereum ecosystem. End-users can continue to use MetaMask or their favourite Ethereum wallet. Interacting with an Obscuro application is the same as interacting with any Ethereum application. With a seamless user and developer experience, Obscuro changes the paradigm around privacy on the blockchain. Obscuro leverages a pragmatic technology for encrypting the ledger, Trusted Execution Environments (TEEs). TEEs provide robust confidentiality guarantees with certainty over the code running. They allow Obscuro to offer smart contracts, decentralisation, scalability and privacy in a way other privacy providing techniques cannot. Obscuro uses Confidential roll-ups, a new type of roll-up inspired by existing roll-up-based L2 offerings Optimistic and ZK roll-ups. The use of confidential computing techniques and economic incentives allows Obscuro to retain the performance and programming model simplicity of Optimistic roll-ups and attain confidentiality, short withdrawal periods, and address MEV.