> For the complete documentation index, see [llms.txt](https://xr-one.gitbook.io/xr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xr-one.gitbook.io/xr/technology/xr-one/architecture/anytrust.md).

# AnyTrust

XR One relies on Arbitrum's AnyTrust technology.

> An Arbitrum protocol that manages data availability with a permissioned set of parties known as the [Data Availability Committee (DAC)](https://docs.arbitrum.io/intro/glossary#data-availability-committee-dac). This protocol reduces transaction fees by introducing an additional trust assumption for data availability in lieu of Ethereum's [Trustless](https://docs.arbitrum.io/intro/glossary#trustless) data availability mechanism. [Arbitrum Nova](https://docs.arbitrum.io/intro/glossary#arbitrum-nova) is an example of an AnyTrust chain; [Arbitrum One](https://docs.arbitrum.io/intro/glossary#arbitrum-one) is an alternative chain that implements the purely trustless (and more L1-gas intensive) [Arbitrum Rollup Protocol](https://docs.arbitrum.io/intro/glossary#arbitrum-rollup-protocol).