You can reach me by email at hchartmann@protonmail.com.

Feel free to encrypt your email with my OpenPGP public key pubkey.asc.

• Fingerprint:

  D475 F556 5658 B5BF FB6E 7019 17EF 0985 8857 9023
  

Most ad blockers work per-app or per-browser. That means ads still slip through in other apps, games, and system-level telemetry. A better approach is to block ads and trackers at the DNS level — before the connection is even established.

This post explains how to set up AdGuard Home as a DNS server on a VPS, accessible only through a WireGuard VPN tunnel. The result: every device connected to your VPN gets network-wide ad blocking with zero client-side configuration beyond changing the DNS server.

Email was never designed to be private. By default, messages travel across the internet in plain text — readable by anyone in between. OpenPGP changes that by adding end-to-end encryption to email, so only you and your recipient can read the content.

This guide walks you through setting up OpenPGP email encryption on macOS using GPG Suite (GPGTools) and Apple Mail.

How OpenPGP Works

OpenPGP uses asymmetric cryptography — a pair of mathematically linked keys: