> For the complete documentation index, see [llms.txt](https://ldsec.gitbook.io/medco-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ldsec.gitbook.io/medco-documentation/v0.2.1/developer-guide/system-architecture.md).

# System Architecture

![../\_images/system\_architecture\_v0.2.png](https://medco.epfl.ch/documentation/_images/system_architecture_v0.2.png)

### Containers

#### medco-connector

Component orchestrating the MedCo query at the clinical site. Implements the resource-side of the PIC-SURE API. It communicates with *medco-unlynx* to execute the distributed cryptographic protocols.

#### medco-unlynx

The software executing the distributed cryptographic protocols, based on Unlynx.

#### i2b2

The i2b2 stack (all the cells).

#### picsure

The query translation and broadcasting layer.

#### glowing-bear-medco

Nginx web server serving Glowing Bear and the javascript crypto module.

#### medco-loader

ETL tool to encrypt and load data into MedCo.

#### keycloak

OpenID Connect identity provider, providing user management and their authentication to MedCo.

#### postgresql

The SQL database used by all other services, contains all the data.

#### pg-admin

A web-based administration tool for the PostgreSQL database.

#### nginx

Web server and (HTTPS-enabled) reverse proxy.

#### php-fpm

PHP processor running with FPM (FastCGI Process Manager), used by Nginx. Executes the PHP code needed to serve the genomic annotations.