Don Castle

Don Castle has spent more than 30 years in information technology, starting at seventeen, including 23 years supporting a university law school where he was the first IT hire. Now retired, he builds and publishes his own apps as an independent developer at CodeCrafted Apps, and he created Digital Life Compass to explain everyday technology, online security, privacy, and emerging digital tools in clear, approachable language.

Don Castle

Don Castle has spent more than 30 years in information technology, starting at seventeen, including 23 years supporting a university law school where he was the first IT hire. Now retired, he builds and publishes his own apps as an independent developer at CodeCrafted Apps, and he created Digital Life Compass to explain everyday technology, online security, privacy, and emerging digital tools in clear, approachable language.

Illustration of seeds spreading on the wind, representing why you can't ban AI once the technology exists.

Why You Can’t Ban AI — and What Encryption’s History Tells Us

Last month the U.S. government switched off Anthropic’s most powerful AI models; just under three...
Illustration of a paused machine, representing the government shutdown of Anthropic's Fable and Mythos AI models.

Anthropic’s Fable and Mythos: What the AI Shutdown Was Really About

I was working in Claude Opus when Mythos turned up in the headlines. It did...
Illustration of a file copied to a laptop, an external drive, and the cloud, showing the 3-2-1 backup rule.

The 3-2-1 Backup Rule, and the Photos You Can’t Get Back

A few years back, someone I know handed me a laptop that wouldn’t turn on....
Illustration of a phone leaving a faint trail, representing phone tracking and location data.

How to Stop Phone Tracking Without Breaking the Useful Parts

Open your phone’s privacy settings. Go ahead — I’ll wait. That little pile of toggles...
Illustration of a phone with several speech bubbles, representing different AI assistant options.

The Best AI Assistant Is Probably the One You Already Own

Everyone keeps telling you to “start using AI,” and it can feel like one more...
A walled garden with a single narrow gate, showing how a computer ecosystem is easy to enter and harder to leave

Tech Ecosystems Are Worth Joining. Check This One Thing First.

My first computer was a VIC-20, which booted straight into BASIC and had nothing you...
Illustration showing a phone receiving a login code, representing different two-factor authentication methods.

The Two-Factor Authentication Most People Use Is the Weakest One

When two-factor authentication started becoming required, it was not popular. It also needed to be...
Illustration of a curtain over a window, representing what a VPN does and whether you need a VPN.

Do You Need a VPN? Probably Less Than the Ads Say

If you listen to podcasts or watch anything on YouTube, you’ve heard the pitch a...
Calm illustration representing the Canvas data breach and what it means for students and families.

Does the Canvas Data Breach Actually Put Your Family at Risk?

If you have a kid in school, or you’re taking classes yourself, you probably got...
A laptop shielded by light in a busy lobby, representing Apple devices on public WiFi.

Public WiFi and the Apple Ecosystem: What Hotel Networks Can and Cannot See

Using a hotel WiFi network is not always optional. Airports, coffee shops, conference centers, hospital...