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Passcode The hackers trying to build a hack-proof operating system

A team of Canadian security researchers is set to unveil a computer operating system called Subgraph designed to protect its users from the most common types of digital attacks.

Illustration by Alicia Tatone

As a teenage hacker in the early 1990s, David Mirza Ahmad quickly learned that even the savviest techies can be "owned," old-school computer slang for exposing someone's identity.

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