Privacy Policy

1. Purpose of Data Collection and Use

Group SMS ("the Service") collects and uses personal information for the following purposes:

• Account registration and management: Identity verification, service provision
• Service delivery: SMS sending, contact synchronization, message history management
• Customer support: Inquiry handling, announcements

2. Personal Information Collected

• Required: Phone number
• During service use: Contact information (name, phone number), message content (encrypted storage)
• Automatically collected: Access logs, device information

3. Data Retention Period

In principle, personal information is deleted without delay once the purpose of collection and use has been achieved.

• Account information: Until account deletion
• Message history: Until user deletes (encrypted storage)
• Access logs: 3 months

4. Third-Party Data Sharing

The Service does not share personal information with third parties except in the following cases:

• When the user has given prior consent
• When required by law or requested by law enforcement following legal procedures

5. Data Encryption

The Service takes the following measures to protect user data:

• Message encryption: All message content is encrypted with the user's personal key. Even server administrators cannot read the content.
• Transmission encryption: All data transmission is encrypted via SSL/TLS.
• Access restriction: Access to personal information is limited to minimal personnel.

6. User Rights

Users can exercise the following rights at any time:

• Request to view personal information
• Request for correction of errors
• Request for deletion
• Request to stop processing

7. Data Protection Officer

The Service has designated a Data Protection Officer to oversee personal data processing and handle user complaints and damage relief.

8. Changes to This Policy

This Privacy Policy may be updated due to changes in laws, policies, or security technologies. Any changes will be announced through the service.