Task persistence is a workflow that continues over time instead of ending in a single session. In security terms, it means a user or system can pause work, switch devices, and later resume with the same task state, context, or permissions. This is common in mobile apps, cloud tools, and AI assistants that keep long-running jobs active.
It matters because persistence expands the attack surface. A task that survives beyond one login may rely on session tokens, notifications, or stored context that can be exposed if a device is lost, shared, or unlocked. Attackers may try to hijack a still-valid session, abuse weak re-authentication, or read sensitive details from lock-screen alerts. Defenders reduce risk with short-lived tokens, step-up authentication for sensitive actions, limited task context on mobile devices, and clear session expiry rules.