> For the complete documentation index, see [llms.txt](https://docs.okkult.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.okkult.io/shield/overview.md).

# Overview

## Overview

Okkult Shield is a non-custodial shielded pool on Ethereum.

It lets users deposit assets into a private pool, transfer value privately, and withdraw back to public Ethereum addresses.

### Key properties

| Property                | What it means                                                     |
| ----------------------- | ----------------------------------------------------------------- |
| **Non-custodial**       | Okkult never holds your funds.                                    |
| **UTXO model**          | Shielded balances are tracked as encrypted-style private outputs. |
| **Compliance native**   | A valid compliance proof is required before shielding.            |
| **Supported assets**    | `USDC`, `WETH`, `WBTC`, `DAI`, `USDT`                             |
| **Fee**                 | `0.20%` on shield and unshield                                    |
| **Immutable contracts** | No admin keys control the deployed contracts.                     |

### Three operations

1. **Shield** — deposit tokens into the private pool.
2. **Private Transfer** — send value between 0zk addresses.
3. **Unshield** — withdraw assets to any public address.

### How Shield works at a high level

When you shield assets, the app creates a private commitment for your balance.

That commitment enters the shielded pool. Later actions spend that private balance with zero-knowledge proofs instead of exposing full transaction details.

### What is visible vs hidden

|          | Visible on-chain          | Hidden                    |
| -------- | ------------------------- | ------------------------- |
| Shield   | Commitment hash, fee      | Amount, token, owner      |
| Transfer | Two new commitments       | Sender, recipient, amount |
| Unshield | Recipient address, amount | Source UTXO, history      |

### Why users choose Shield

* It keeps assets under the user's control.
* It adds privacy without leaving Ethereum.
* It supports compliant entry into private flows.

### Next Steps

* [How it works](/shield/how-it-works.md)
* [Shield assets](/shield/shield-assets.md)


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