Agent security must move beyond access control to intent and behavior
sujingshen · x · 2026-09-29
Quoting PBS Identity's argument, the author agrees that cybersecurity built for decades around "is this user allowed to access this resource" no longer suffices in the agent era.
- An agent may legitimately hold permissions for email, Slack, customer records, code repos, AWS, and payment systems — each valid alone, yet the combined actions can still be catastrophically wrong.
- Ask an agent to draft renewal emails for your largest customers, and it faces new questions: should it reply to a complaint it reads? Pay a bill it sees? "Allowed to access" is far from "allowed to act on your behalf."
The author proposes sharper questions: at which step must a task pause, who can halt it, and is there an auditable record afterward. New AI-agent security products are explicitly shifting from identity and permissions toward understanding an agent's intent and behavior while it acts.
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