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Marco Franssen

My personal blog on Software development.

Blog.

Hi, my name is Marco. Working as a Senior Software Architect at Philips. I'm an Open Source Maintainer and Contributor.

If you like my work, consider to sponsor my work.

I wrote my first blog March 2011. Mostly I'm writing on software development. In total I wrote 79 articles in 8 categories. Use search below to filter by title or click a category or tag to filter by category or tag.

Categories

DevOps Software development Golang JavaScript Windows Linux Windows Phone Uncategorized

Tags

GPG Git SSH Vault Sigstore Docker SLSA GitHub Helm Kubernetes Traefik React Nginx Elasticsearch Web TLS Letsencrypt HTTP/2 Raspberry Pi raspbian Testing Benchmarking HTML5 VirtualBox Node.js vagrant Mocha Debian packer.io BDD Grunt npm Jenkins MSBuild C#CQRS Fluent Security JSON KnockoutJS Microsoft PowerShell Windsor MVVM MVC3 vhd jQuery Ncqrs DDD

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Stories

Automate GPG subkey rotation — Part 4

Automate GPG subkey rotation — Part 4

Marco Franssen

November 2, 2026

Rotate your GPG subkeys and write a fresh offline backup with one command, using a script that keeps your primary fingerprint and old encryption keys.

Rotate your GPG subkeys — Part 3

Rotate your GPG subkeys — Part 3

Marco Franssen

November 2, 2026

Rotate expiring GPG subkeys without changing your primary fingerprint: add new subkeys, retire old ones, and update Git, GitHub, and SSH.

Keep your primary GPG key offline — Part 2

Keep your primary GPG key offline — Part 2

Marco Franssen

November 2, 2026

Remove your primary GPG key from your laptop, keep signing Git commits with subkeys, upload keys to GitHub, and use your GPG subkey for SSH.

Create a GPG key with subkeys — Part 1

Create a GPG key with subkeys — Part 1

Marco Franssen

November 2, 2026

Create a GPG primary key with separate signing, encryption, and authentication subkeys, add multiple email addresses, and back them up safely.