Bitcoin Gets Stealthy: Researchers Propose Privacy-Focused Metaprotocol

Researchers from Alloc Init have proposed Shielded Bitcoin, a metaprotocol designed to hide BTC transfer amounts and counterparties without changing Bitcoin's consensus rules or relying on trusted bridge operators.

The proposal, presented by Clara Shikhelman, Mikhail Komarov, and Aleksei Moskvin, uses cryptographic proofs instead of a trusted intermediary to move value privately. It borrows the encrypted-note approach from Zcash but builds it directly on Bitcoin's existing base layer.

According to the researchers, anyone can run indexers, meaning no single party can control the ledger. The design also distinguishes spending from viewing, letting a wallet split into separate keys: one that spends funds and another that is read-only and detects incoming transfers.