ARPA Network (ARPA) is a decentralized secure computation network built to improve the fairness, security, and privacy of blockchains. ARPA threshold BLS signature network serves as the infrastructure of verifiable Random Number Generator (RNG), secure wallet, cross-chain bridge, and decentralized custody across multiple blockchains. ARPA enables secure multi-party computation (MPC), verifiable randomness, and data interoperability in a trustless environment, making it suitable for applications across gaming, identity, Web3 services, and DeFi. The network’s flagship technology is the Threshold BLS Network, which generates decentralized, verifiable random numbers (dRand) that are essential for fairness and unpredictability in use cases like lotteries, gaming, and NFT minting. These random values are produced by a distributed network of nodes using threshold signature schemes, ensuring tamper-resistance and auditability without centralized control. Randcast, a verifiable Random Number Generator (RNG), is the first application that leverages ARPA as infrastructure. Randcast offers a cryptographically generated random source with superior security and low cost compared to other solutions. Metaverse, game, lottery, NFT minting and whitelisting, key generation, and blockchain validator task distribution can benefit from Randcast’s tamper-proof randomness. The ARPA token powers the network’s economic model. It is used to incentivize node operators, pay for cryptographic services (such as randomness generation), and participate in governance. Token holders can stake ARPA to secure the network and earn rewards. Node operators are selected based on staking and performance, and they contribute to the decentralized computation and randomness generation process. ARPA is designed to integrate privacy-enhancing technologies into blockchain ecosystems while maintaining scalability and efficiency. It supports interoperability across multiple chains and enables developers to incorporate randomness and MPC capabilities directly into their decentralized applications. With its focus on privacy, verifiability, and decentralized computation, ARPA Network is building foundational infrastructure for the next generation of blockchain-powered applications.