A Computer Use Agent（CUA） maintains security during sensitive actions by applying strict rules for data protection, access control, and masking. When interacting with fields like passwords, PINs, or confidential identifiers, the CUA avoids reading or storing the contents—treating those fields as opaque. Screenshot logging may be disabled or selectively redacted during sensitive steps to ensure secure information is never exposed during audits or debugging. CUAs can also restrict themselves to operating only within approved applications or windows, reducing the chance of interacting with personal or sensitive content unintentionally.
To ensure safe execution, the CUA verifies each action before and after it occurs. For example, before entering a password, the agent checks that the correct login dialog is visible. If a suspicious or unexpected screen appears—such as a phishing-like prompt—the CUA halts and notifies the developer. Some CUAs include role-based permissions so administrators can restrict access to high-risk workflows, system configurations, or applications with sensitive data. These restrictions provide an additional layer of protection, especially in regulated environments such as finance or healthcare.
Semantic memory also contributes to security when used with a vector database such as Milvus or Zilliz Cloud. By storing embeddings of authorized login screens or known safe prompts, the CUA can detect anomalies by comparing new screens to trusted ones. If the similarity score falls below a threshold, the CUA treats the situation as potentially unsafe. This method provides reliable, visual-based protection against malicious dialogs or UI spoofing attempts—adding a security layer that traditional automation systems cannot match.