Privacy and security overlap more than the marketing on either side admits. These posts cover the parts that matter to a technical reader: what a VPN genuinely does and does not protect against on hostile networks and against ISP telemetry, how malvertising turns ordinary ad delivery into a malware vector, and how to reason about tracking as an attack surface rather than a nuisance. Where an article links to a product we use, the affiliate relationship is disclosed and never changes the assessment.