Solana's Transparency Has a Privacy Problem. Here's What Stealf Is Changing. Imagine receiving your salary, paying rent and sending money to someone you care about, only to discover that a stranger can inspect your wallet's history. They can trace your incoming payments, examine your balance and follow your transactions to other wallets. You might never meet this person, yet they can build a picture of your financial activity without your permission. This is the paradox of public blockchains: your wallet can be pseudonymous while your financial behaviour remains exposed. For individuals and businesses alike, that visibility can reveal sensitive information and create opportunities for unwanted scrutiny. This is more than a question of hiding balances. On a transparent blockchain, transaction amounts, wallet interactions and financial patterns can be analysed long after a payment is completed. Even if your wallet doesn't carry your name, repeated interactions can make your activity easier to associate with you. Transparency is essential for independently verifying blockchain transactions, but exposing every financial detail isn't a prerequisite for financial accountability. The challenge is to preserve verifiability without making privacy the price users pay for participating in onchain finance. Stealf is addressing this challenge on Solana by separating financial privacy from everyday spending. Its dual-wallet architecture consists of a shielded wallet for assets and a spending account for daily transactions, with no direct onchain link between them, according to its bounty description. The spending account uses stablecoins, digital assets designed to maintain a relatively stable value against another asset. USDC, for example, is designed to maintain a one-to-one value with the US dollar. This makes stablecoins useful for everyday digital payments while avoiding the ordinary price volatility associated with assets such as SOL. Stealf's separation gives this everyday payment model a distinct privacy dimension. The technical foundation extends into Arcium's confidential computing network, which uses multi-party computation (MPC) to execute operations on encrypted inputs across participating nodes. Instead of giving one computing party access to the complete plaintext data, MPC distributes the computation so that individual nodes cannot independently inspect the underlying inputs. Arcium's Multiparty Computation eXecution Environments (MXEs) coordinate these confidential computations, while the resulting operations can be integrated with Solana programs and their onchain execution flows. This is significant because it allows developers to design applications around confidential shared state, rather than limiting privacy to simply concealing information from public view. Stealf's open beta, with more than 700 testers reported in the bounty brief, puts this approach into an everyday financial context. Its underlying proposition addresses a fundamental limitation of public wallets: people need to transact onchain without necessarily exposing their entire financial history. The future of onchain finance isn't just about making transactions verifiable; it's also about giving people meaningful control over the financial information those transactions reveal. @STEALFxyz @Arcium