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Passcode
Modern field guide to security and privacy
Alicia Tatone
An illustration of the web of vulnerabilities.

Video: What is a zero-day?

Melanie Teplinsky, cybersecurity expert and adjunct professor at American University’s Washington College of Law, explains. 

  • By Fallon Schlossman
  • Evelyn Wang

There's a race going on between hackers, governments, and companies to discover zero-day vulnerabilities. 

Why are these flaws so valuable? Because the companies don't know about them – so if they get into the wrong hands, hackers can access people's data without them knowing.  

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Melanie Teplinsky, cybersecurity expert and adjunct professor at American University’s Washington College of Law, explains the lifecycle of a zero-day. 

This video is part of a joint project between The Christian Science Monitor’s Passcode team and Northwestern University's Medill School of Journalism about the growing arms race to discover software vulnerabilities – and what it means for national security and everyone’s digital privacy and safety.

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