# 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).