> For the complete documentation index, see [llms.txt](https://vnx.gitbook.io/vnx-global/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://vnx.gitbook.io/vnx-global/developer/concepts.md).

# Concepts

- [Authentication](https://vnx.gitbook.io/vnx-global/developer/concepts/authentication.md)
- [Travel Rule](https://vnx.gitbook.io/vnx-global/developer/concepts/travel-rule.md)