> 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/v1.0.0/developers/system-architecture.md).

# System Architecture

![](/files/-LydZiVjzlAQfhK2omed)

### 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. [Sources on GitHub](https://github.com/ldsec/medco-connector).

#### medco-unlynx

The software executing the distributed cryptographic protocols, based on Unlynx. [Sources on GitHub](https://github.com/ldsec/medco-unlynx).

#### glowing-bear-medco

Nginx web server serving Glowing Bear and the javascript crypto module. [Sources on GitHub](https://github.com/ldsec/glowing-bear-medco).

#### medco-loader

ETL tool to encrypt and load data into MedCo. [Sources on GitHub](https://github.com/ldsec/medco-loader).

#### i2b2

The i2b2 stack (all the cells). [Project website](https://www.i2b2.org/).

#### keycloak

OpenID Connect identity provider, providing user management and their authentication to MedCo. [Project website](https://www.keycloak.org/).

#### postgresql

The SQL database used by all other services, contains all the data. [Project website](https://www.postgresql.org/).

#### pg-admin

A web-based administration tool for the PostgreSQL database. [Project website](https://www.pgadmin.org/).

#### nginx

Web server and (HTTPS-enabled) reverse proxy. [Project website](https://www.nginx.com/).