Research proposes private Bitcoin transfers on base layer without fork
A paper from Alloc Init introduces Shielded Bitcoin, a metaprotocol for private transfers on Bitcoin Layer 1. It uses encrypted notes, nullifiers, and zero-knowledge proofs to hide amounts and counterparties while preventing double-spending. No custodian holds funds, and read-only keys allow selective disclosure, though entry and exit points may leak metadata.
A paper from Alloc Init outlines Shielded Bitcoin, a Layer 1 metaprotocol for confidential transfers. It avoids changing Bitcoin’s consensus rules, launching another chain, or relying on a custodian. Instead, zero-knowledge proofs, encrypted notes, and nullifiers let participants verify rules while concealing senders, receivers, and values, and block repeated spending.
Read-only keys permit selective disclosure to auditors or counterparties without spending authority. Entry and exit routes, called PIPEs, stay visible, so the researchers acknowledge that some metadata may remain exposed. The design targets businesses and treasuries seeking privacy on Bitcoin’s public ledger.
If adopted, Shielded Bitcoin could give businesses, treasuries, and trading desks more confidentiality when moving funds on Bitcoin’s public ledger. Auditors and counterparties may still gain access through read-only keys, potentially easing compliance concerns. Yet visible entry and exit points could leave metadata traces, so users seeking stronger anonymity may remain exposed. Regulators and chain-analysis firms might face reduced visibility, while ordinary users may see privacy expectations shift. Overall impact depends on adoption, tooling, and how disclosure balances confidentiality with oversight.