For my last semester in university (summer semester 2018) at the KIT, I was part of a project to create an “online art exhibition”. We planned to produce different media formats in smaller groups. One for video, another for text and promotion and one for the online presence. I’ve figured out a concept with a […]

Two-factor authentication (short 2FA) is an important security concept to secure unauthorized access to your web applications. Popular online services like Google Mail, Instagram or Facebook already provide this mechanism to secure user accounts with an additional one-time token. Considering someone is able to obtain your username and password combination, for example on a public […]

I already tried using Nextcloud as a backup solution which will sync my complete home directory into a Nextcloud instance. This is very practical if you want to have access to your files when you don’t have your laptop with you or when it gets lost. Of course there are some drawbacks with this approach: […]

For some time now I was thinking about a good backup solution for our root server. We are using our hard drives in RAID0 mode which means that the two hard drives are not mirrored. Therefore we could use the complete 5TB space. In this scenario, complete data loss is quite likely from time to […]

I consider auto updates of userland software as an important and also convenient security feature, easpecially on mobile platforms. As far as I know this is already the default behaviour for Android systems with Google Play Store preinstalled. Some time ago I switched from Play Store to the open-source F-Droid market which offers many good […]

Most of the popular Linux distributions don’t offer any sandboxing or anonymization capabilities and it can be quite difficult to find a good solution. In this post I’m going to describe how I manged to sandbox the messenger app Signal and tunnel all it’s traffic through the anonymization network Tor. All the tool you need […]

For a longer time I was looking for a more direct and faster method to setup my Linux installation medium on an USB flash drive. Usally one would download an ISO image and wait for it to finish before copying to the drive. Both tasks could take some time, depending on your internet connection and […]