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Senior Technology Correspondent
Marcus Chen covers consumer technology, artificial intelligence and digital privacy. A former software engineer, he translates complex systems into practical advice and has tested hundreds of gadgets, apps and security tools.
Readers can reach Marcus through our contact page. Learn how we report in our Editorial Policy.
Phone and laptop makers increasingly run AI features locally rather than in the cloud. We explain how on-device processing works, where its privacy benefits end, and which settings to check.
Passkeys let you sign in with a fingerprint, face scan or device PIN instead of a password. Here is how they work, why security experts favor them, and how to start using them.
Laws and industry policies are slowly making it easier to fix the devices people own. Here is how the right-to-repair movement developed, what has changed, and what remains contested.
Low-Earth-orbit satellite networks have brought faster connections to places that cables never reached. We explain how the technology works, its trade-offs, and how to decide if it fits.
Smart cameras, locks and speakers add convenience but can also add risk. This guide explains what to look for in connected devices and how to keep a smart home safer.