Privacy Policy

Last updated: July 12, 2026

Data Matrix Technology Limited (數據矩陣科技有限公司, operating under the brand "CosPhi") ("we", "us", "our") respects your privacy. This Privacy Policy explains how we collect, use, store and protect your personal data when you use WatchTower (the "Service") and the cosphi.cc website.

1. Data We Collect

2. How We Use Your Data

We do not use your personal data for purposes beyond the above without your consent, and we never sell your personal data.

3. Cookies

This website uses only essential cookies to maintain login sessions and provide basic security protection. We do not use third-party advertising or tracking cookies. You can manage cookies in your browser settings, but disabling essential cookies may affect normal use of the Service.

4. Data Sharing

We share necessary data with third parties only in the following cases:

5. Data Security

We apply industry-standard safeguards including transport-layer encryption (TLS), password hashing, access controls and audit logging. However, no internet transmission is absolutely secure; in the event of a data breach, we will notify affected users as required by applicable law.

6. Data Retention

7. Your Rights

Subject to applicable data protection laws, you have the right to access, review, copy, correct, supplement or delete your personal data, and to request that we cease processing it. To exercise these rights, email [email protected] and we will respond within a reasonable time.

8. Children's Privacy

The Service is not directed at children under 16. If we learn that we have collected a child's personal data without guardian consent, we will delete it promptly.

9. International Transfers

Your data may be stored or processed on servers outside your jurisdiction. We ensure such transfers comply with applicable law and are subject to reasonable safeguards.

10. Changes to This Policy

We may revise this Policy from time to time. Revisions will be posted on this page with an updated "Last updated" date; material changes will be separately notified by email or website announcement.

11. Contact

Data controller: Data Matrix Technology Limited (數據矩陣科技有限公司)
Address: Flat A516, 5/F, Efficiency House, 35 Tai Yau Street, San Po Kong, Kowloon, Hong Kong
Support email: [email protected]