Earlier this year, NSA whistleblower Edward Snowden met with Jacqueline Moudeina, the first female lawyer in Chad and a legendary human rights advocate who has worked tirelessly to bring former dictator Hissène Habré to justice. Habré was convicted of human rights abuses — ordering the killing of 40,000 people, sexual slavery, and rape — by a Senegalese jury in 2016.

Snowden told Moudeina that he was working on an app that could turn a mobile device into a kind of motion sensor in order to notify you when your devices are being tampered with. The app could also tell you when someone had entered a room without you knowing, if someone had moved your things, or if someone had stormed into your friend’s house in the middle of the night. Snowden recounted that pivotal conversation in an interview with the Verge. “She got very serious and told me, ‘I need this. I need this now. There’s so many people around us who need this.’”

Haven, announced today, is an app that does just that. Installed on a cheap burner Android device, Haven sends notifications to your personal, main phone in the event that your laptop has been tampered with. If you leave your laptop at home or at an office or in a hotel room, you can place your Haven phone on top of the laptop, and when Haven detects motion, light, or movement — essentially, anything that might be someone messing with your stuff — it logs what happened. It takes photos, records sound, even takes down changes in light or acceleration, and then sends notifications to your main phone. None of this logging is stored in the cloud, and the…

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