Best Practices for Preventing Unauthorized Document Capture and Access

The Reality 
 Unfortunately, there's no foolproof technical solution to prevent screenshots. If someone can view a document on their screen, they can potentially capture it through: 
 
 Screenshots 
 Phone cameras 
 Screen recording software 
 
 Practical Limitations 
 Prevention Through Access Control  Rather than trying to block screenshots, focus on: 
 
 Minimize Exposure : Don't share sensitive documents digitally unless absolutely necessary 
 Control Who Has Access : Use role-based permissions (Managers, Editors, Viewers) 
 Create Audit Trails : Enable access logs so you know who viewed what and when 
 Use Secure Platforms : Store highly sensitive documents in end-to-end encrypted services like Tresorit rather than general cloud drives 
 Implement Data Classification : Classify documents by sensitivity level and apply appropriate security measures 
 
 Detection Over Prevention  Since you can't fully prevent screenshots, focus on detection: 
 
 Watermark documents with recipient-specific identifiers 
 Maintain detailed access logs 
 Use platforms that track viewer IP addresses and email verification 
 Create clear policies about acceptable use 
 
 Technical Controls 
 Document Watermarking 
 
 Add watermarks to sensitive documents for leak detection 
 Tresorit offers watermarking features for shared videos and documents to prevent unauthorized re-sharing 
 
 Access Controls & Monitoring 
 
 Use platforms like Tresorit that provide access logs to track who viewed documents 
 Enable download tracking to monitor document access 
 Implement time-limited access with expiration dates on shared links 
 Use download limits (e.g., 5-10 opens) for highly sensitive documents