> For the complete documentation index, see [llms.txt](https://docs.codebattles.ru/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.codebattles.ru/en_v3/how-the-system-works/bezopasnost.md).

# Security

<figure><img src="/files/gf9JhV8db4hfMH9qrUaU" alt=""><figcaption></figcaption></figure>

The Codebattles platform ensures the security of executable programs using several tools.

### Docker

[**Docker**](https://www.docker.com) - an application for containerization.

The checker application runs in an isolated container. The checkers' container network is launched in isolation from the general subnet.

### Bubblewrap

[**Bubblewrap**](https://github.com/containers/bubblewrap) - a sandbox for applications. Used, for example, in [Flatpak](https://flatpak.org/)

Within Docker, a sandbox with network and file system isolation is used.

***

Using the above methods of protection from malicious actors, one can be confident in the system's security.