Learn in the textbookDenial-of-Service, Zero-Day, and Attacks Targeting AI
DefinitionA zero-day attack (ゼロデイ攻撃) exploits a software vulnerability after it has been found but before the developer's fix is available.
ExplanationA vulnerability is a security weakness that comes from a flaw in how software is built, and the developer distributes a program that repairs it, called a patch. To prepare for zero-day attacks, organizations combine patching with other measures, such as adding layers that watch for suspicious activity.
AnalogyIt is like a burglar who learns the emergency exit lock is broken and slips in that very night, before the locksmith has come.
Memory hookRead "zero-day" as "the developer had zero days to respond" and it sticks.