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Data Loss Prevention

What Is Data Loss Prevention (DLP)? A Practical 2026 Guide

Jan 11, 2026 · 7 min read
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Siberson Team
Jan 11, 2026 · 7 min read

Data Loss Prevention (DLP) is the set of controls that detect and stop sensitive data from leaving your organisation — through email, the web, cloud sync, removable media, print and, increasingly, GenAI prompts. Done well, DLP is the last line between a small mistake and a reportable breach.

Why DLP earned a bad reputation

Legacy DLP relied on blind pattern-matching: crude regular expressions that flag anything resembling a card or ID number. The result was an avalanche of false positives, alert fatigue, and controls that teams quietly switched off. The technology worked; the approach didn't.

Classification-driven DLP changes the equation

Modern DLP acts on what data actually is. When files carry a classification label, policies enforce on the label plus context — the user, device, destination and channel — instead of guessing from raw content. That cuts noise dramatically and lets you block the genuinely risky actions without frustrating everyone else.

What good DLP covers

Look for coverage across every egress channel, channel-specific actions (allow, warn, block, encrypt, justify), endpoint enforcement that works offline, and audit-ready incidents mapped to GDPR, ISO 27001, PCI DSS and KVKK. Siberson Verikor delivers all of this from a single console.

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