Last updated: April 8, 2026
1. Introduction
OKBall ("we", "our", or "us") operates the KaiLian VPN application. This Privacy Policy explains how we collect, use, and protect your information when you use our service.
2. Information We Collect
Account Information
- Username (or anonymous device identifier for guest accounts)
- Encrypted password (bcrypt hashed, never stored in plain text)
Connection Information
- Connection timestamps and duration for session management
- Selected server node (for load balancing purposes only)
- Device platform (iOS, Android, macOS, Windows, TV)
What We Do NOT Collect
- We do not log your browsing activity or destination websites
- We do not store your real IP address after session ends
- We do not monitor, record, or inspect your network traffic content
- We do not sell or share your personal data with third parties
3. How We Use Your Information
We use the collected information solely for:
- Authenticating your account and managing sessions
- Enforcing fair usage policies (device limits, bandwidth allocation)
- Maintaining service quality and server load balancing
- Providing customer support when you contact us
4. Data Security
We implement industry-standard security measures including:
- End-to-end encryption for all VPN traffic
- Passwords hashed with bcrypt (12 rounds)
- JWT-based authentication with token rotation
- TLS encryption for all API communications
5. Data Retention
Connection session data is automatically deleted after 15 minutes of inactivity. Account data is retained while your account is active. You may request account deletion at any time by contacting our support team.
6. Children's Privacy
Our service is not intended for children under 13. We do not knowingly collect personal information from children.
7. Third-Party Services
Our app may use Cloudflare CDN infrastructure for content delivery. Cloudflare's privacy policy applies to their services. We do not integrate advertising SDKs or analytics trackers.
8. Your Rights
You have the right to:
- Access the personal data we hold about you
- Request correction of inaccurate data
- Request deletion of your account and associated data
- Withdraw consent at any time by discontinuing use of the service
9. Changes to This Policy
We may update this Privacy Policy from time to time. We will notify users of significant changes through the app or by updating the "Last updated" date above.
10. Contact Us
If you have questions about this Privacy Policy, please contact us at: