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The Gart app home screen on a phone
Android

Gart app

Hold one button and your alert, your location and your response protocol reach your Responders. Free, on Android.
Free
Personal Opsec Checklist - Free sample
PDF

Personal Opsec Checklist - Free sample

Start closing your gaps before someone else finds them.
Free
Kidnapping, ransom and physical attacks: challenges in cryptocurrency security
PDF + EPUB

Kidnapping, ransom and physical attacks: challenges in cryptocurrency security

Gart Research, February 2026. A full analysis of documented physical attacks against cryptocurrency holders. PDF and EPUB.
Free