My last blog post was about encrypting backups. The backups can easily be decrypted on my local computer with gpg --decrypt. But what if the data is to be decrypted on a remote server? The whole thing is more difficult because the required Yubikey is not available on the remote computer. This mean...

Background

No backup, no mercy! That's why I store my backups in several locations with different hyperscalers (aws, hetzner, azure). But are these providers really trustworthy when it comes to my life insurance policy, for example? I can't thoroughly check the existing security mechanisms. I al...

What happened

A few days ago, I once again had to retrieve a large amount of data from M$ Sharepoint. The way I know is via Onedrive. You create a shortcut in Onedrive and then tell it to keep the whole folder locally. Since I rarely use Windows, I do this stuff in a Windows VM. Unfortun...

Introduction

I use the function on my yubikey every day to log on to servers as if by magic. It is not necessary to enter a password every time. After a while you get used to this convenience and find it annoying to enter the password every time to unlock the PC. As I have to take the Yubikey with...

I have been using a self-written Python script for several years now to automatically provide OpenVPN configurations for our employees https://vpngw.im-c.de. A few weeks ago the script would no longer work. The reason were outdated libraries which I used to create the necessary things (CSR, CA,...