ARPA, also known as ARPA Network, is a decentralized computation network that strives to enhance the fairness and privacy of blockchains. It utilizes a threshold BLS signature network as the infrastructure for a variety of applications, including a verifiable Random Number Generator (RNG), a wallet with enhanced security, a cross-chain bridge, and decentralized custody across multiple blockchains. ARPA Network is designed with flexibility and verifiability in mind, with the ability to adapt to multiple blockchains, catering to developers' needs in the multiverse.

ARPA Network operates through a unique system architecture of threshold signature scheme (TSS). It employs an innovative protocol design and multiple unique mechanisms, allowing it to adapt the threshold BLS scheme for blockchain. The network is decentralized, with multiple entities in different regions running individual nodes, making it resistant to tampering from a physical perspective. All signatures generated by ARPA Network are verified on-chain before fulfilling the request, ensuring the integrity of the system. The network also adopts an asynchronous non-interactive communication design for the signature generation, aiming to guarantee responsive service and high availability.

ARPA Network has a wide range of potential use cases. Its first application, Randcast, a verifiable Random Number Generator (RNG), offers a cryptographically generated random source with enhanced security and low cost. This randomness, which is resistant to tampering, can be beneficial for metaverse, game, lottery, NFT minting and whitelisting, key generation, and blockchain validator task distribution. Additionally, ARPA Network can serve as the infrastructure for wallets with enhanced security, cross-chain bridges, and decentralized custody across multiple blockchains. It also supports various applications utilizing the threshold signature schemes due to its flexible network topology.

ARPA was initially known as ARPA Chain, a privacy-preserving Multi-party Computation (MPC) network founded in 2018. Over the years, ARPA Mainnet has completed over 224,000 computation tasks, gaining experience in MPC and other cryptography. This experience laid the foundation for the innovative threshold BLS signature schemes (TSS-BLS) system design, which played a part in the creation of today’s ARPA Network. The network is built by cryptographers, engineers, and entrepreneurs, participating in a decentralized blockchain ecosystem together with the community.

ARPA Chain's privacy-preserving Layer-2 framework is designed to cater to a variety of use cases. It has the potential to function as a data computation and storage network, and can support applications in financial technology (FinTech) and insurance, artificial intelligence (AI), Internet of Things (IoT), healthcare, digital advertising, and retail. The system can also be used for data marketplaces, key management, blind voting, dark pool trading, and personal data wallets. ARPA Chain has potential use in credit and anti-fraud mechanisms that enable banks to share credit blacklists to facilitate risk management processes. ARPA is also developing Randcast, a system for decentralized random number generation (RNG) that allows developers to create decentralized applications (dApps) using a specific fee structure.

ARPA Chain has formed several partnerships related to its blockchain-based solution for privacy-preserving computation. One such collaboration is with a decentralized oracle network that provides real-world data to smart contracts on the blockchain. This partnership seeks to explore the combination of privacy and decentralized finance (DeFi). Another such partnership is with an enterprise-grade provider of node and staking infrastructure. This collaboration aims to maintain the robustness, security, and decentralization of the ARPA network. ARPA Chain has also formed a partnership with an online travel agency to integrate the ARPA token on the travel website’s platform. In addition, ARPA Chain has formed a partnership with a DAO to bring ARPA’s Randcast technology to a certain chain, providing a layer of secure and verifiable randomness to drive the development of Autonomous Worlds. ARPA Chain has also received a strategic investment from a lab to expedite the development of innovative applications built upon its infrastructure.

ARPA Chain is designed to function as a privacy-preserving computation network. It is intended to improve the transaction throughput of blockchain networks while maintaining high standards for data privacy and security. ARPA Chain employs Secure Multi-Party Computation (SMPC) and secret-sharing technology to maintain privacy and computational accuracy. It is designed to ensure that nodes are unable to receive secure data to which they do not initially have access, improving overall network scalability and processing times. ARPA Chain's structure includes a protocol layer that operates in a decentralized and permissionless manner, allowing nodes to join autonomously to support the network's functionality. It also includes a computation layer designed to allow nodes on ARPA to collectively carry out multi-party computation. ARPA Chain's privacy-preserving Layer-2 framework has potential applications in various sectors, including financial technology (FinTech) and insurance, artificial intelligence (AI), Internet of Things (IoT), healthcare, digital advertising, and retail.

ARPA Chain seeks to provide a platform for businesses and enterprises to perform joint data analysis while keeping sensitive data encrypted. This is achieved through a technology known as Multi-party Computation (MPC), which allows data sets from different sources to be combined and analyzed without decrypting the original data. This approach may be suitable for industries such as finance and healthcare, where sensitive data needs to be shared and analyzed without compromising privacy. ARPA Network's focus on privacy-preserving computation extends to data protection, exploring potential methods for data utilization. It aims to provide businesses with a way to use sensitive information without compromising data privacy. ARPA Network's use of Secure Multi-Party Computation (SMPC) is a different approach from other encryption methodologies, aiming to provide scalability, versatility, and efficiency.

ARPA Chain utilizes Secure Multi-Party Computation (SMPC) and secret-sharing technology with the intention of maintaining privacy and computational accuracy. SMPC allows the ARPA Layer-2 solution to strive to protect and validate transactions while facilitating transaction processing for various blockchain networks. ARPA Chain's computation aims to ensure that nodes cannot access secure data they do not initially have access to, contributing to network scalability and processing times. The complex nature of computation is performed off-chain, allowing SMPC to aim to be deployed on different blockchain networks in an interoperable manner. ARPA Chain's computations have potential applications in various sectors, including financial technology, artificial intelligence, healthcare, digital advertising, and retail. ARPA Chain's computations have potential applications in areas such as data marketplaces, key management, blind voting, dark pool trading, and personal data wallets.

ARPA Chain, also known as ARPA Network, utilizes a threshold BLS signature network as the foundation for a variety of applications, including a verifiable Random Number Generator (RNG), a secure wallet, a cross-chain bridge, and decentralized custody across multiple blockchains. ARPA Network incorporates elements of flexibility and verifiability, with the capacity to adapt to multiple blockchains, accommodating various developer requirements in the multiverse. This cross-chain capability is intended to facilitate interoperability among different blockchain networks. ARPA seeks to function as a bridge among different blockchain networks.