> ## Documentation Index
> Fetch the complete documentation index at: https://allhandsai-tech-notes-llm-key-protection.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Tech Notes

> In-depth technical articles on OpenHands architecture, security, and implementation details

Tech Notes provide detailed technical explanations of how OpenHands works under
the hood. These articles go beyond basic documentation to explain architecture
decisions, security models, and implementation details that help you understand
and trust the platform.

## Available Tech Notes

<CardGroup cols={1}>
  <Card title="LLM API Key Protection" icon="key" href="/enterprise/tech-notes/llm-key-protection">
    How OpenHands protects LLM API keys from agent access, including the
    security architecture for LiteLLM virtual keys and BYOK configurations.
  </Card>
</CardGroup>

## About Tech Notes

Tech Notes are written for:

* **Security teams** evaluating OpenHands for enterprise deployment
* **Platform engineers** integrating OpenHands into existing infrastructure
* **Developers** who want to understand how OpenHands works internally

Each Tech Note includes:

* Detailed technical explanations with code references
* Security considerations and threat models
* Architecture diagrams where applicable
* Links to relevant source code for verification