QUICK DEFINITION
Distributed Denial of Service — An attack that overwhelms an online service with traffic or requests from many sources.
WHY IT MATTERS
Why Distributed Denial of Service matters in finance
Availability failures can disrupt customer access, trading interfaces and payment services even without data theft.
FINANCIAL SYSTEM CONTEXT
← Back to the Financial Security GlossarySecurity is also a market-infrastructure question
In financial services, distributed denial of service should be understood in relation to operational continuity, data integrity, payments, market infrastructure and interconnected dependencies. A control can be technically effective while still leaving material resilience risk if critical services cannot continue or recover during disruption.