There are two types of data on FlexMeasures servers - files (e.g. source code, images) and data in a database (e.g. user data and time series for energy consumption/generation or weather).
Files are stored on EBS volumes on Amazon Web Services. These are shared with other customers of Amazon, but protected from them by Linux’s chroot system – each user can see only the files in their own section of the disk.
Database data is stored in PostgresDB instances which are not shared with other Amazon customers. They are password-protected.
Finally, The application communicates all data with HTTPS, the Hypertext Transfer Protocol encrypted by Transport Layer Security. This is used even if the application is accessed via http://.