IRI CellShield is data masking software for PII and PHI at rest in Excel spreadsheets. Built on IRI FieldShield technology, CellShield enables point-and-click, reversible and non-reversible protections directly in Excel columns. CellShield Enterprise Edition (EE) is the only full-featured, professional data masking package for Excel that combines and automates data discovery, protection, reporting, and audit details in your LAN, Azure, and SharePoint repositories.