An optional security mode for macOS and iOS that reduces the attack surface of the operating system by disabling certain commonly attacked features. 

CyberWire Glossary link: https://thecyberwire.com/glossary/apple-lockdown-mode

Audio reference link: “How NSO Group’s Pegasus Spyware Was Found on Jamal Khashoggi’s Fiancée’s Phone,” FRONTLINE, YouTube, 18 July 2021.

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