Zero-Trust Data Loss Prevention (DLP) • Chrome Extension

One DLP Solution to Stop Data Exfiltration
Before It Leaves The Workstation.

XpertLync CyberGuard DLP Chrome Extension protects modern enterprise workforces from unauthorized cloud storage uploads, personal webmail transfers, clipboard credential leaks, and single-page web app AJAX exfiltration. Licensing is structured on an authenticated Per-Device Workstation basis.

Buy Enterprise License (Per-Device) Test Live Interactive Simulator LinkedIn Enterprise Case Study Download Package (.ZIP)

100%

Pre-Upload In-Memory Blocking

< 3 ms

Zero-Latency File Screening

4 Vectors

Inputs, Drag & Drop, Clipboard, APIs

Per-Device

Hardware-Bound Workstation Activation

https://wetransfer.com/api/v4/transfers

XpertLync CyberGuard ACTIVE

STEP 1: SELECT EXFILTRATION THREAT VECTOR

STEP 2: CHOOSE RESTRICTED CORPORATE ASSET

📊

Q3_Financial_Audit_2026.xlsx

Spreadsheet • 14.2 MB • Confidential

RESTRICTED

🔑

AWS_Production_Keypair.pem

Cryptographic Key • 3.2 KB • Critical

PROHIBITED

👥

Customer_PII_Database_Dump.csv

Structured Data • 88.4 MB • Sensitive

PROHIBITED

🛡️

Workstation Protected

Policy engine is monitoring browser file pickers, dropzones, and background AJAX endpoints. Trigger an attempt on the left to see live interception.

[SYSTEM] CyberGuard DLP v1.0.0 Active • Workstation ID: EP-HYD-041

[POLICY] Mode: Blacklist Active • Target: *.wetransfer.com/api/*

[ALERT] SMTP Delivery Ready: smtp.office365.com:587 (STARTTLS)

Adjust to Risk

Adapt

Restrict workstation browser events to least-privilege access, tighten controls when employee behavior indicates a risk, and respond in real-time to prevent confidential corporate data from leaking.

Live Cycle: Intercepting exfiltration

< 3 ms

In-Memory Analysis

Zero

Network Latency

User

Employee

Identity type

Workstation Endpoint

Tool

WeTransfer (unsanctioned)

Action

Write to external app

INSPECTION ENGINE XpertLync DLP Gateway Analyze context & risk in real time

User permissions

Employee (standard)

Tool risk

Unsanctioned (high risk)

Data sensitivity

Contains customer PII (high)

                    
Action type
Write action (requires approval)

Comprehensive Architectural Defense

Engineered to Stop Every Modern Browser Exfiltration Channel

Traditional network firewalls and proxies are blind to client-side single-page applications and encrypted TLS payloads. XpertLync CyberGuard DLP operates right at the workstation browser engine.

⚡

Pre-Upload Binary Inspection

Inspects files before upload packets are constructed. Enforces forbidden extensions, size caps, and mime-type validations directly in memory.

Zero Latency Extension Screening File Size Thresholds

🖐️

Drag-and-Drop Shield

Intercepts operating system drag events originating from Windows Explorer into web browser dropzones (WeTransfer, Slack Web, personal cloud portals).

OS Drag Intercept Dropzone Shield Prevent Sideload

📋

Clipboard & Paste Guard

Neutralizes data loss via Ctrl+V. Detects copied file handles, cryptographic keys (.pem, .key), database dumps, and credentials pasted into web forms.

Ctrl+V Intercept Key Screening Screenshot Guard

🌐

In-Page API Interception

Hooks modern Single Page Application (SPA) fetch() and XMLHttpRequest pipelines, neutralizing FormData and binary AJAX exfiltration.

SPA Hook FormData Audit AJAX Payload Filter

🎯

Upload URL Endpoint Targeting

Granular URL path matching targeting upload API endpoints (e.g. *.wetransfer.com/api/v4/transfers*) while permitting standard portal browsing.

Regex & Wildcards Endpoint Presets Surgical Control

📁

Bulk Rule Importer via File

Deploy thousands of corporate domain policies and upload URL endpoints in seconds by uploading standard CSV, TXT, or JSON files directly into the extension console.

CSV / TXT / JSON Preview Parser Rule Export

📧

Enterprise SMTP & Bravo API

Instant administrator alert dispatch via custom corporate SMTP servers (Office 365, Google Workspace, Postfix with STARTTLS/SSL on port 587/465) or Bravo/Brevo API.

Custom SMTP (587/465) STARTTLS Relay Bravo API v3

🔒

Anti-Tamper Shield Armor

Employees cannot turn off protection or uninstall the extension. Master Shield toggles and license deactivations are gated by Administrator PIN authentication.

PIN Challenge Tamper Escalation Immutable Enforcement

📊

Verifiable Compliance Logs

Every violation logs the workstation device name, device ID, user name, and platform for forensic reporting. One-click CSV and JSON exports for ISO 27001 & GDPR audits.

Device Telemetry User Identification ISO 27001 A.8.12

Comparative Technology Analysis

Why Browser-Native DLP Outperforms Legacy Network Proxies

See how XpertLync CyberGuard DLP solves the architectural blindspots of legacy web gateways and bulky endpoint agents.

Security Capability	XpertLync CyberGuard DLP	Legacy Network Web Proxy	Bulky Heavy OS Agent
Pre-Upload Form & File Interception	✅ Instant (Blocks before upload starts)	❌ Fails on encrypted client SPA payloads	⚠️ High CPU & Battery Overhead
Drag-and-Drop Exfiltration Shield	✅ Native Browser Event Interception	❌ Blind to DOM drag events	⚠️ Inconsistent application hooks
Clipboard (Ctrl+V) File & Key Paste Guard	✅ Intercepts files, PEM keys & credentials	❌ No clipboard visibility	⚠️ Heavy hook causing keystroke lag
Target Specific Upload Endpoints (/api/v4/transfers)	✅ Surgical URL Path Regex Matching	❌ Can only block entire domains	❌ Requires kernel network driver
Deployment & Rollout Time	✅ Under 2 Minutes (Chrome Extension)	❌ Months of complex PAC/SSL cert rollouts	❌ Requires OS reboot & admin rights
Enterprise Custom SMTP & Bravo Alerting	✅ Built-in Port 587 STARTTLS & Bravo API	⚠️ Requires separate SIEM forwarder	⚠️ Complex proprietary relay
Tamper Protection	✅ Password Challenge on Master Shield	❌ Users bypass via personal hotspots	⚠️ Vulnerable to process termination
Licensing Model	💻 Per-Device Workstation Activation	💲 Inflated per-seat enterprise bundles	💲 Expensive multi-year contracts

Scalable Fleet Quotas

Enterprise Fleet Quotas & Device Tiers

Select your organization's device quota tier or contact our security specialists for customized multi-fleet enterprise deployment.

Starter Fleet

50

Workstation Devices

50 Device Activations
All 4 Threat Vectors Protected
Blacklist & Whitelist Modes
Custom SMTP & Bravo API Alerts
PIN Anti-Tamper Shield

Buy 50 Device Quota

Test File Upload Interception

If you have the XpertLync CyberGuard DLP Chrome Extension installed, try selecting or dragging a restricted file (.pdf, .xlsx, .pem, .zip) into the box below.

🛡️

Drag & Drop Any File Here to Test Screening

Or click to browse files from your computer. Protected workstations will preemptively block restricted types.

🏢 The product belongs to XpertLync Solutions Pvt. Ltd. Hyderabad, India.

For enterprise licensing and compliance support, write to: compliance@xpertlync.com

One DLP Solution to Stop Data Exfiltration Before It Leaves The Workstation.