the.com/insider threat
the firewall never sees it coming because it's already inside, badge and all.
means a security risk posed by someone with legitimate access — employee, contractor, partner — who misuses that trust, maliciously or by accident.
from security jargon that matured with corporate IT in the 90s, but the concept is ancient: every heist movie needs someone on the inside, and every empire fell partly from within.
top causenegligence beats malice in most incidents
detection lagoften takes months, unlike external breaches
classic casesnowden had full legitimate access
cost factorpricier per incident than external attacks