GMX Tresor is an Android app designed to provide secure encryption for sensitive files stored in the GMX MediaCenter. This app is perfect for those who want to add an extra layer of protection to their cloud-based files. The app generates an individual key using a unique password, which is then used to convert the files into an unreadable sequence of characters before uploading them to the cloud. This ensures that all your files remain confidential and under your control. To view the files in plain text, you can simply unlock the Tresor with your password.

The app offers several benefits, including automatic encryption of all files added to GMX Tresor, local encryption on your smartphone, and versatile encryption of all file types, including images, office documents, videos, and music files. The AES encryption method guarantees secure end-to-end encryption of your files with a key length of 256 bits, making them unbreakable. Best of all, the app is free to download.