ARPA is a blockchain-based layer 2 solution for privacy-preserving computing, enabled by Multi-Party Computation ("MPC"). Founded in April 2018, ARPA's goal is to separate data utility from ownership and enable data rental. ARPA's MPC protocol creates ways for multiple entities to collaboratively analyze data and extract data synergies while keeping each party's data input private and secure. Developers can build privacy protection dApps on ARPA-compliant blockchains. Some immediate use cases include anti-credit fraud, secure data wallet, precision marketing, co-training of AI models, and key management systems. For example, banks using the ARPA network can share their credit blacklist with each other for risk management purposes without exposing their customers' data or privacy. ARPA collaborates with technology organizations and companies such as the IEEE Standard Association, ISO, JD.com, Sinochem Group, CAICT, Elrond, and Chainlink.