> For the complete documentation index, see [llms.txt](https://docs.fairmath.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fairmath.xyz/fair-math-payments/key-features.md).

# Key Features

Fair Math Payments is based on two key abstractions:

#### Privacy Zones

Configurable privacy compatible environments that define:

* What metadata is hidden (amounts, senders, timing)
* What performance/cost is expected
* How compliance is handled (audit logs, disclosure rules)

Each zone can be tailored for general use, enterprise-grade flows, or app-specific needs.

#### Privacy Providers

Entities that power zones using one of three models:

* **Trusted** — custodians, issuers, or internal teams
* **Cryptographic** — ZK, MPC, or FHE backends
* **Hybrid** — TEE + proof-based logic

This separation allows privacy to be **modular and composable**, with asset movement and policy enforcement across zones.