> For the complete documentation index, see [llms.txt](https://docs.netauthpay.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.netauthpay.com/agents/privacy-and-security.md).

# Privacy and Security

#### Privacy guarantees

* **Visibility**: Only the sender and recipient of a payment can retrieve its details via the API.
* **Privacy tokens**: Each payment is associated with a privacy token (x402 or local); tokens are used internally to preserve privacy.
* **Backend-only signing**: Private keys never leave the server; agents only see public keys and balances.

#### Security measures

* **Encryption at rest**: Wallet private keys are encrypted with AES-256-GCM using `ENCRYPTION_KEY`.
* **No key exposure**: Agents do not receive or handle private keys.
* **Validation**: All payment and batch requests are validated (amounts, no self-payment, no duplicate recipients in batch).
* **HTTPS**: Use TLS in production for the NetAuth API.
* **Secrets**: Keep `ENCRYPTION_KEY` and any x402 keys in environment variables or a secrets manager; never commit them.

#### Recommendations

* Use a strong, unique `ENCRYPTION_KEY` in production.
* Run NetAuth in a private network where only your agents/systems can call it, or protect the API with auth (e.g. API keys or auth proxy).
* Consider rate limiting and monitoring for production.
* Plan for key rotation and backup of encrypted wallet data if you persist it.

***


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