Privacy Policy for Rosetta

Last updated: May 22, 2026

Rosetta IM is operated by ROSETTA CLOUD SERVICES LIMITED ("Rosetta", "we", "us", or "our"). This Privacy Policy explains how we handle information when you use Rosetta, our end-to-end encrypted messaging application, and our website at https://rosetta.im.

1. Information We Collect

Rosetta is designed to minimize data collection. Registration does not require a phone number, email address, or real name. The app uses cryptographic keys and technical identifiers needed to operate the service.

• Account and cryptographic data: public keys, account identifiers, and related technical data needed to identify users and deliver encrypted messages. Private keys are intended to remain on your device.
• Encrypted messages and media in transit: message text, files, and media are encrypted before they are sent. Our servers are designed to relay encrypted payloads and encrypted message keys, not to read message contents.
• Device and app data: app version, operating system, platform, architecture, update request data, IP address, timestamps, and server logs needed for security, reliability, abuse prevention, and update delivery.
• Support communications: if you contact us, we may process your email address, message content, and any information you choose to provide.

2. Information We Do Not Collect for Advertising

We do not use third-party advertising SDKs, advertising trackers, or cross-app tracking. We do not sell your personal information.

3. How We Use Information

We use information only to:

• provide, maintain, and secure Rosetta;
• route encrypted messages between users;
• deliver app updates and downloads;
• detect abuse, prevent fraud, and protect service integrity;
• respond to support requests;
• comply with legal obligations.

4. End-to-End Encryption

Rosetta is designed so that message content is encrypted before it reaches our servers. Our servers are not intended to have access to decrypted message contents or decrypted media. Messages are stored on users' devices rather than as readable message history on our servers.

5. Sharing of Information

We may share limited information only with:

• infrastructure and hosting providers that help us operate Rosetta;
• professional advisers, if necessary;
• authorities or other parties when required by law or to protect rights, safety, and security.

Any service provider that processes user data for us must protect it consistently with this Privacy Policy.

6. Retention

Encrypted message data in transit is processed only as needed to deliver the service. Technical logs and support communications are retained only for as long as reasonably necessary for security, reliability, support, legal, and operational purposes.

7. Your Choices and Rights

Depending on where you live, you may have rights to access, correct, delete, or object to certain processing of your personal information. To make a request, contact us at admin@rosetta.im.

Because Rosetta minimizes account data and uses cryptographic identifiers, some requests may require you to provide information that helps us verify control of the relevant account or keys.

8. Children

Rosetta is not directed to children under 13, or the minimum age required in your jurisdiction. If we learn that we have collected personal information from a child without required consent, we will take appropriate steps to delete it.

9. International Transfers

ROSETTA CLOUD SERVICES LIMITED may process information in countries other than where you live. Where required, we use appropriate safeguards for international transfers.

10. Security

We use technical and organizational measures designed to protect information. No system is perfectly secure, and users are responsible for protecting their devices, private keys, and account access.

11. Changes to This Policy

We may update this Privacy Policy from time to time. If we make material changes, we will update the "Last updated" date and, where appropriate, provide additional notice.

12. Contact

ROSETTA CLOUD SERVICES LIMITED Registered address: UNIT 704C 7/F BLK 3 NAN FUNG IND CITY 18 TIN HAU RD TUEN MUN HONG KONG

Email: admin@rosetta.im

Phone: +852 2891 0030