Guide
Redact PII before employees submit prompts to AI tools
- 01
Identify sensitive values
- 02
Replace with stable tokens
- 03
Restore only inside your boundary
Direct answer
PII redaction for AI prompts inspects text and attachments before submission, identifies personal information, and removes or replaces sensitive values according to policy. The sanitized prompt can continue to the AI service when the remaining context is sufficient for the task.
Why AI prompts create a distinct data path
Employees can paste customer records, support transcripts, source material, and internal documents into a chat interface in seconds. This feels different from uploading a database, but the underlying data transfer can be equivalent.
Traditional controls often focus on email attachments or file uploads. An AI control must also understand text entered into a browser, structured fields inside an application, and attachments submitted alongside the prompt.
Preserve intent while removing identifiers
Blocking every prompt containing personal information can make approved AI workflows unusable. Redaction offers a more precise action when the model needs the surrounding narrative but does not need the person's identity.
For example, a support team can ask an AI assistant to summarize a case after the customer's name, email address, telephone number, and account identifier have been replaced with stable labels. The relationships remain understandable without sending the original values.
- Inspect prompt text and supported attachments
- Detect standard and organization-specific sensitive values
- Apply allow, redact, replace, block, or review policy
- Send only the transformed content to the destination
Evaluation questions for enterprise teams
A useful evaluation tests the languages, data formats, AI tools, and workflows employees actually use. It should measure missed detections and false positives separately, confirm where processing occurs, and verify that original values are not copied into logs or alerts.
Maskflare applies this on every path: the gateway and SDKs mask prompts, attachments and streamed responses to nine AI providers, and the Workforce desktop agent and browser protection mask prompts typed into ChatGPT, Claude, Gemini, DeepSeek and Perplexity on the web.
Related PII guidance
Frequently asked questions
Can redaction happen before the AI provider receives the prompt?
Yes. An inline control can transform the prompt before it is transmitted, so the destination receives the sanitized version rather than the original values.
Does PII redaction make every AI prompt safe?
No. Prompts may contain confidential business information, credentials, source code, or regulated data that is not PII. A broader policy must cover those categories and the destination's permitted use.
Should blocked prompts still be logged?
The policy outcome can be logged, but logs should avoid reproducing the original sensitive values. Metadata and redacted context are generally safer for review.