> For the complete documentation index, see [llms.txt](https://docs.acre.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.acre.fi/key-concepts/tbtc.md).

# tBTC Decentralized Bitcoin Bridge

Built atop [tBTC](https://tbtc.network/), Acre selected a non-custodial and decentralized bitcoin tokenization service for launch allowing mainnet bitcoin to be securely bridged on Ethereum and beyond. Maintained and operated by the [Threshold Network DAO](https://docs.threshold.network/), it relies on a system of decentralized nodes rather than a single centralized custodian.\
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Supported on the largest DeFi, restaking and bitcoin L2 protocols, this choice for a permissionless bridge increases the different vault partners for Acre without sacrificing security.

## Security

Fully backed and redeemable for BTC, this bridge requires a threshold majority signature (51 out of 100) before node operators mint or redeem the underlying asset. You can learn more about tBTC minting [here](https://docs.threshold.network/applications/tbtc-v2).