Identity Attack Surface
Identity Attack Surface is the sum of all identity entry points and systems that attackers can target. It includes user accounts, service accounts, credential storage, identity platforms, and any system involved in authentication or authorization decisions.
# WHAT TEAMS RUN INTO
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Identity attack surface grows with every new system and integration. A cloud app adds new entry points. A service account needs credentials stored somewhere. Each addition expands the surface.
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Legacy systems expand the surface without adding value. An old application that runs on-premises becomes part of identity federation, creating a bridge that modern systems can exploit to reach legacy systems.
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Unknown systems expand the surface invisibly. Shadow IT — applications deployed without IT approval — become part of the identity attack surface. Attackers find shadow systems that IT doesn't know about.
# WHY IT MATTERS
Every system in the identity attack surface is a potential breach entry point. Every entry point is a place where an attack can start. Organizations with large identity attack surfaces have many targets for attackers. Organizations with small, well-managed identity attack surfaces have fewer targets and can defend them thoroughly. The goal is not to eliminate the attack surface entirely — that is impossible — but to minimize it and understand every part of it.