Masking
Hiding or replacing sensitive information with placeholder values so the underlying data can't be viewed or extracted.
Related terms
AI Anonymization
Removing or masking personally identifiable and confidential information from data before it reaches an AI or LLM, so the model never sees sensitive raw data.
Local Redaction
Removing or masking sensitive data on a customer's own servers — before it is ever sent to an external AI model.
Software Code Protection
Anonymizing or masking proprietary source code, API keys, and license keys before they reach external AI tools.
M&A Due Diligence
The investigative review process before a merger or acquisition, involving highly confidential financial and legal documents.
Medical Identifiers
Patient names, record numbers, and diagnoses that qualify as PHI and require protection before AI processing.
See Masking in practice
Questa AI anonymizes sensitive data before it reaches any AI model — across documents and live prompts, with governance and data-residency control.