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Topic starter
20/08/2026 5:26 pm
TL;DR: PDFs remain a major blind spot in data security because sensitive records often live in scanned images, tables, metadata, and encrypted files that legacy tools miss, according to Sentra. Treating PDF inspection as optional leaves cloud storage, email archives, and shared drives exposed to broad document-level data leakage.
NHIMG editorial — based on content published by Sentra: PDF scanning for data security in Sentra
By the numbers:
- Sentra says 100+ other file formats are covered by the same cloud processing engine used for PDFs.
Questions worth separating out
Q: How should security teams govern sensitive PDFs in cloud storage?
A: Security teams should treat PDFs as high-risk records that need the same classification, retention, and access review discipline as structured data.
Q: What fails when PDF scanning does not handle images and tables?
A: The failure is that sensitive values remain inside layouts the scanner cannot interpret.
Q: How do you know if PDF discovery is actually working?
A: Look for coverage across native text PDFs, scanned image PDFs, metadata, and encrypted files, not just total file counts.
Practitioner guidance
- Implement structure-aware PDF classification Use scanners that can detect table boundaries, extract cell values, and classify document layouts separately from surrounding text so invoices, statements, and forms are not flattened into low-fidelity matches.
- Require OCR coverage for image-based PDFs Validate that scanned contracts, faxed forms, and image-only PDFs are passed through OCR and then into the same classifier stack as native text files, rather than being treated as empty containers.
- Inventory encrypted and unreadable PDFs Track password-protected and encrypted PDFs as first-class findings, including location and file properties, so opaque clusters in unexpected buckets trigger review instead of being ignored.
What's in the full article
Sentra's full blog post covers the operational detail this post intentionally leaves for the source:
- Parser and OCR handling details for native versus scanned PDFs
- How table extraction improves classification accuracy for invoices and statements
- How encrypted PDFs are inventoried even when content inspection fails
- Why the same processing model is applied across the broader file estate
👉 Read Sentra's analysis of PDF scanning for data security and DSPM →
PDF scanning in DSPM: what security teams need to account for?
Explore further
20/08/2026 6:15 pm
PDF scanning is a data governance control, not a file-format feature. The article is right to frame PDF inspection as part of broader DSPM, because the document format often carries regulated data that is operationally invisible until it is too late. That makes PDF handling relevant to cloud security, data security, and identity governance when documents sit in repositories with broad or stale access. Practitioners should treat PDF coverage as a control boundary, not an optional add-on.
A question worth separating out:
Q: Should document governance include PDFs outside core systems?
A: Yes, because the risk is often higher outside core systems where sharing, copying, and archiving multiply. Contracts, HR files, and financial records commonly move through email, shared drives, SaaS tools, and backups, so governance needs to follow the document wherever it is stored and not assume the source system still controls exposure.
👉 Read our full editorial: PDF scanning is becoming essential for cloud data security
