In every company, employees need access to critical data to perform their tasks, but this access must be accompanied by appropriate controls. Organizations cannot afford situations where confidential information, such as contracts, customer data, or technical documentation, leaves the company without the knowledge or approval of the IT department. Unfortunately, such incidents occur more frequently than one might expect.

This is precisely why more and more companies are turning to DLP (Data Loss Prevention) solutions. These tools are designed to prevent data leaks, both intentional (such as an employee stealing information) and accidental (such as sending a file to the wrong recipient or clicking a phishing link).

DLP systems enable organizations to precisely define who can perform which actions with sensitive data and under what conditions. For example, they can block copying files to personal USB drives, sending data through external messaging applications, or pasting document excerpts into AI chat tools.

Implementing DLP is a critical component of the security strategy of any company that wants to maintain control over its information.

How Do Data Leaks Happen? Real-World Scenarios

Not everyone realizes how common data leaks are and how easily they can occur, often without anyone noticing. Based on our experience working with clients, we have collected examples of everyday situations in which information is leaked, either unintentionally or deliberately. These real-world scenarios demonstrate how easily organizations can lose control of their data and why investing in preventive security systems is worthwhile.

1. Transferring Data from Corporate Cloud Storage to Personal Accounts

An employee has two accounts open in their browser at the same time, for example, a corporate OneDrive account and a personal one. A simple drag-and-drop operation is enough for corporate data to end up outside the organization's control.

2. Sending Files to Personal Email Accounts or Messaging Applications

An employee sends corporate documents to their personal email address, WhatsApp, or Messenger. As a result, the data leaves the secure IT environment and enters unencrypted or unauthorized communication channels.

3. Using AI Tools to Process Sensitive Data

To speed up their work, an employee pastes excerpts from confidential reports or sensitive information (such as Polish PESEL identification numbers or fragments of software source code) into ChatGPT or other generative AI tools. As a result, the data is transferred to external systems, often outside Europe and without the company's knowledge.

4. Copying Files to USB Drives or Other Storage Devices

An employee copies corporate files to a USB drive to finish a task at home. Once the device is connected to a personal, unsecured computer, the data moves outside the protection of corporate security systems and beyond the IT department's visibility.

Even worse, USB drives are easy to lose, and access to the stored data is often not protected in any way. A moment of carelessness can be enough for confidential information to fall into the wrong hands.

5. Phishing and Malware

Clicking on an infected attachment or malicious link can be enough to install malware on an employee's computer. The malware can then steal data in the background and transmit it to servers controlled by cybercriminals, without the knowledge of either the user or the company.

6. Employee Account Takeover by a Hacker

A cybercriminal obtains an employee's login credentials, for example through phishing, and downloads confidential documents, reports, or personal data. From the perspective of security systems, the activity may appear entirely legitimate.

7. Deliberate Actions by an Insider (Insider Threat)

An employee with access to sensitive data (for example, in accounting, HR, or IT) intentionally removes information from the organization. They may copy it, send it externally, or sell it to competitors. Incidents of this type are difficult to detect without DLP.

How Can DLP Minimize the Risk of Data Leaks?

The effectiveness of DLP depends primarily on proper configuration tailored to the company's specific requirements, user roles, and the sensitivity of its data.

The first step should be to identify the organization's actual business needs and the threats it faces. Next, it is worth analyzing the available protection rules, including those predefined by the DLP vendor and the options for adapting them to specific internal processes.

Modern DLP systems make it possible to create detailed security policies that control user activities based on:

• File type (e.g., blocking the copying of .docx documents to personal USB drives).
• Content (e.g., detecting and blocking strings of characters such as PESEL identification numbers or employee phone numbers).
• Applications and SaaS services (e.g., applying different rules to OneDrive, Google Drive, or the company's cloud environment).
• Individual users or teams (e.g., preventing the HR department from copying certain data to USB storage devices while allowing unrestricted access for the CEO).
• User actions (e.g., blocking screenshots on specific websites).

This level of granular control enables organizations not only to respond to security incidents but, more importantly, to prevent them before a security breach occurs.

However, it is important to remember that DLP security policies must be regularly maintained and updated to ensure the system continues to deliver the expected results.

Overview of DLP Solutions

Netskope

Netskope DLP is a solution that dynamically detects and protects sensitive information across cloud environments, networks, and endpoints.

The system uses advanced technologies such as:

• EDM (Exact Data Matching) – accurately matching data against predefined patterns.
• OCR (Optical Character Recognition) – recognizing text in images and scanned documents.
• Machine Learning (ML)-based classification – understanding the context and structure of data.
• File fingerprinting – identifying protected documents even when they have been modified.

Additionally, Netskope DLP integrates with external data classification systems (such as Microsoft Purview, Titus, and Boldon James) and scans more than 1,600 file types, significantly improving the effectiveness of detecting security violations.

The solution relies on more than 3,000 predefined data identifiers and compliance profiles covering regulations from 80 countries, supporting standards and regulations such as GDPR, CCPA, PCI-DSS, and HIPAA.

Thanks to its flexible security policy engine, Netskope enables organizations to:

• Block data transfers between corporate and personal accounts.
• Restrict data uploads to unauthorized applications and messaging platforms.
• Define rules based on roles and permissions for specific users and teams.

The solution operates using a SaaS model, which means easy deployment, scalability, and no need to invest in on-premises infrastructure.

However, it is worth noting that Netskope DLP does not protect against offline activities, such as copying data to USB drives. In such cases, it is recommended to complement the solution with Netskope Endpoint DLP, which extends data protection capabilities to endpoint devices.

Prisma Access Browser

Prisma Access Browser is an advanced extension of the Palo Alto Prisma Access platform that brings data protection beyond the cloud and closer to users' endpoint devices.

By installing a managed browser on employees' computers, the solution enables organizations to enforce detailed DLP policies, such as blocking downloads of cloud data to USB drives, preventing screenshots, or restricting the pasting of confidential information into external applications such as messaging platforms and AI chat tools.

Unlike traditional cloud-based solutions, Prisma Access Browser provides direct control over how data is used on an employee's device, regardless of whether they work in the office or remotely.

It goes far beyond traditional DLP by enabling organizations to apply endpoint-level controls without requiring the full installation of EDR software or local agents.

However, it is important to remember that this protection applies only to activities performed within the managed browser. If a user downloads a file and opens it in a local text editor, subsequent operations will no longer be covered by the browser's security policies.

For this reason, it is important to implement appropriate measures, such as file encryption policies that allow files to be opened only within Prisma Access Browser, or restrictions on screenshots, text copying, printing, and other activities, depending on the company's requirements.

For organizations seeking modern data protection at both the cloud and user levels, Prisma Access Browser is a flexible, effective, and future-oriented addition to their security strategy.

It also enables companies to implement a Bring Your Own Device (BYOD) model more easily and effectively, while providing external contractors with secure and controlled access to the information they need.

Forcepoint

Forcepoint DLP provides integrated protection across endpoints and cloud services, ensuring consistent control over data flows throughout an organization's environment.

It is currently one of the few solutions offering agent-based DLP protection both on-premises and in the cloud without requiring multiple separate tools.

However, one potential drawback is the complexity of deploying the on-premises version, which requires greater resources and technical expertise.

Nevertheless, for companies seeking maximum control over their data and security environment, Forcepoint remains one of the most advanced and comprehensive DLP solutions available.

It is important to remember that no single tool can protect an organization 100% of the time. Choosing the right solution depends on the organization's individual needs. Contact us, and our experts will advise you on the most effective ways to protect your business.

This article was prepared by a 4Prime expert and subsequently edited with the assistance of artificial intelligence tools.