Introduction
Welcome to BlockStar Cypher, a decentralized messaging platform developed by BlockStar LLC.
We are committed to protecting your privacy and ensuring the security of your personal information.
This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our service.
By using BlockStar Cypher, you agree to the collection and use of information in accordance with this policy.
If you do not agree with the terms of this Privacy Policy, please do not access or use our service.
Information We Collect
Blockchain & Wallet Information
When you connect your wallet to BlockStar Cypher, we collect:
- Your public wallet address (on BlockStar Chain, Ethereum, or other supported networks)
- Your BlockStar @name NFT metadata
- Public encryption keys generated for secure messaging
Message Data
🔒 End-to-End Encryption: All messages sent through BlockStar Cypher are encrypted
using ECDH (Elliptic Curve Diffie-Hellman) key exchange. We cannot read the contents of your messages.
Only you and your intended recipients can decrypt and view message contents.
We store the following message-related data on our servers:
- Encrypted message content (unreadable without recipient's private key)
- Message timestamps
- Sender and recipient wallet addresses
- Message delivery and read status
Files & Media
When you share files, images, voice messages, or other media:
- Files are stored on our secure servers
- File metadata (name, size, type) is retained
- Voice messages are stored in their original format
Technical Information
We automatically collect certain technical information:
- IP address (for connection purposes)
- Browser type and version
- Device information
- Connection timestamps
How We Use Your Information
We use the information we collect to:
- Provide and maintain our messaging service
- Facilitate secure communication between users
- Verify wallet ownership and NFT authenticity
- Deliver messages, files, and media to intended recipients
- Provide real-time online/offline status indicators
- Enable voice and video calling features
- Improve and optimize our service
- Detect and prevent fraud or abuse
- Comply with legal obligations
Data Security
🛡️ Your Security is Our Priority: BlockStar Cypher employs industry-leading
security measures to protect your data, including end-to-end encryption, secure WebSocket
connections, and wallet-based authentication.
Our security measures include:
- End-to-End Encryption: Messages are encrypted on your device and can only be decrypted by the recipient
- Wallet-Based Authentication: No passwords to steal – authentication via cryptographic wallet signatures
- ECDH Key Exchange: Secure key derivation ensures only intended parties can read messages
- Secure Transport: All data transmitted over encrypted connections (WSS/HTTPS)
- No Message Logging: We cannot access or read your encrypted message contents
Data Retention
We retain your information for as long as necessary to provide our services:
- Messages: Stored until deleted by users or account termination
- Files & Media: Retained as long as the associated message exists
- Account Data: Maintained while your wallet is registered with our service
- Technical Logs: Typically retained for 30 days for security purposes
You may request deletion of your data at any time by contacting us. Note that due to the
nature of blockchain technology, certain on-chain data (like NFT ownership) cannot be deleted.
Information Sharing
We do not sell, trade, or rent your personal information. We may share information only in these circumstances:
- With Other Users: Your public wallet address, @name, and online status are visible to your contacts
- Service Providers: We may use third-party services for hosting, analytics, and infrastructure
- Legal Requirements: We may disclose information if required by law or valid legal process
- Safety: To protect the rights, safety, or property of BlockStar LLC, our users, or the public
Your Rights & Choices
You have the following rights regarding your data:
- Access: Request a copy of your personal data
- Correction: Request correction of inaccurate data
- Deletion: Request deletion of your data (subject to legal retention requirements)
- Portability: Request your data in a portable format
- Objection: Object to certain types of data processing
To exercise these rights, please contact us at the information provided below.
Third-Party Services
BlockStar Cypher integrates with the following services:
- BlockStar Chain: Our native blockchain for identity and messaging (Primary)
- Other Blockchain Networks: Ethereum, Polygon, and other EVM-compatible chains
- BlockStar Wallet: Our native wallet with full feature integration (Recommended)
- Other Wallet Providers: MetaMask, WalletConnect, Coinbase Wallet, and other Web3 wallets
Third-party services have their own privacy policies, and we encourage you to review them.
We are not responsible for the privacy practices of third-party services.
Children's Privacy
BlockStar Cypher is not intended for use by individuals under the age of 18. We do not
knowingly collect personal information from children. If you believe we have collected
information from a child, please contact us immediately.
International Data Transfers
Your information may be transferred to and processed in countries other than your country
of residence. These countries may have different data protection laws. By using our service,
you consent to the transfer of your information to these countries.
Changes to This Policy
We may update this Privacy Policy from time to time. We will notify you of any changes by
posting the new Privacy Policy on this page and updating the "Effective Date" above.
You are advised to review this Privacy Policy periodically for any changes.
Contact Us
If you have any questions about this Privacy Policy, please contact us: