Amazon Connect now supports restricting the use and access of attributes to a single flow. Now, you can granularly control when an attribute is associated with a contact (and shows up in the contact record) or if it can only be accessed by a specific flow (used only when that flows is executing a customer experience). For example, if your flow is automatically authenticating your customer’s identity using personally identifiable information (PII), you can use flow attributes to prevent the PII information from showing up in contact records or to an agent.
Source:: Amazon AWS