[Arc Releases Privacy Whitepaper, Offering Controlled Privacy Solutions for On-Chain Finance] According to official sources, Arc has released a privacy whitepaper and introduced the confidential smart contract engine, Arc Privacy, to provide controlled privacy solutions for on-chain finance. This feature is optional and aims to protect sensitive financial activities such as payroll distribution, fund management, transaction workflows, and asset issuance, while retaining access for authorized parties like auditors and compliance entities. The design philosophy of Arc Privacy is 'privacy with control,' ensuring that sensitive details are not exposed to public blockchains during transaction processing, while still allowing authorized parties to access information when necessary. Arc stated that most public blockchains default to making transaction data and smart contract states publicly visible, which makes it challenging for many real-world financial workflows to migrate on-chain. Arc's privacy features ensure that payroll data should not become market data, fund flows should not expose counterparties and strategies, and transaction workflows should not broadcast intentions before execution.