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Overview
[[alloc] init] develops cryptographic protocols for Bitcoin. Our primitives and metaprotocols expand what can be built on Bitcoin without changing consensus.
We're currently building Shielded Bitcoin, a non-custodial metaprotocol for financial privacy on Bitcoin L1 — without relying on trusted operators, another chain, or separate consensus.
- Enable programmable vaults
- Connect Bitcoin L1 to shielded state
One shared foundation
How it fits together
PIPEs provide the cryptographic primitive for enforcing arbitrary conditions on Bitcoin without changing consensus. Programmable security vaults on the L1 use PIPEs to control native BTC, encrypting the ability to spend behind cryptographic conditions that can be satisfied with a zero-knowledge proof. Shielded Bitcoin builds on these vaults to enable private transfers, with protocol state derived directly from Bitcoin history.
