Privacy Policy

Introduction

ChainGuard ("the Extension") is a browser extension for Google Chrome that provides advanced protection against phishing attacks, scam websites, and malicious links targeting cryptocurrency users and Web3 participants. This Privacy Policy explains how the Extension handles user data and information.

Developer Information

Developer: ChainGuard Security

Contact Email: chainguard@gmail.com

Data Collection and Usage

What Data We Collect

ChainGuard does NOT collect, transmit, or share any personal data. The Extension operates entirely locally within your browser with the following exceptions for security purposes only:

Security Database Updates

The Extension periodically downloads updated threat databases containing known phishing URLs and malicious smart contract addresses. This download:

• Contains only threat signature data, not user information
• Does not transmit any user browsing data
• Is performed over encrypted HTTPS connections
• Does not include any personally identifiable information

Data Stored Locally

The Extension uses Chrome's storage.local API to save the following data exclusively on your device:

• Protection settings: Your security preferences and alert configurations
• Whitelist: Websites you have manually marked as trusted
• Blocked sites history: A local log of blocked phishing attempts (optional)
• Threat database cache: Local copy of the threat signature database
• Extension preferences: UI settings and notification preferences

All of this data is stored locally on your device. None of your browsing activity, wallet addresses, or personal information is ever transmitted to any external server.

URL Checking Process

When you visit a website, ChainGuard performs the following security check:

• The URL is checked against the locally stored threat database
• Pattern matching is performed locally to detect suspicious URLs
• Smart contract addresses are verified against known scam addresses locally
• No URLs or browsing data are sent to external servers

Permissions

The Extension requests the following browser permissions:

Data Sharing

ChainGuard does NOT:

• Collect any personally identifiable information (PII)
• Track your browsing history or behavior
• Send your visited URLs to external servers
• Access or transmit your wallet addresses or private keys
• Use analytics, telemetry, or tracking tools
• Display advertisements
• Monetize user data in any way

Data Retention

Since all data is stored locally on your device:

• Data persists until you clear your browser data or uninstall the Extension
• You can clear all Extension data at any time through Chrome's settings
• Uninstalling the Extension automatically removes all locally stored data

Security

All data stored by ChainGuard resides locally on your device within Chrome's secure storage sandbox. The threat database updates are downloaded over encrypted HTTPS connections. No user data is transmitted over the network, eliminating risks associated with data interception or unauthorized remote access.

Cryptocurrency and Wallet Safety

ChainGuard is designed with cryptocurrency security as a top priority:

• We NEVER access, request, or store your wallet private keys
• We NEVER interact with your cryptocurrency transactions
• We NEVER require wallet connection to function
• Our protection works entirely at the URL/website level

Children's Privacy

ChainGuard does not knowingly collect any data from children under the age of 13. Since the Extension does not collect any personal data from any user, it is compliant with the Children's Online Privacy Protection Act (COPPA).

Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Any changes will be reflected by updating the "Last Updated" date at the top of this document. Continued use of the Extension after any modifications constitutes acceptance of the updated Privacy Policy.

Open Source

ChainGuard is built with standard web technologies and our threat detection algorithms are transparent. We are committed to security through transparency.