Privacy Policy

D-Zone App privacy policy V1.0

This privacy policy is formulated by [Shenzhen Onlyowner Computer Technology Co., Ltd.] (hereinafter referred to as “Shenzhen Onlyowner”) and applies to your understanding of our development D-Zone App (hereinafter referred to as “this App”) access and use of the supporting Bluetooth hardware device “D-Zone” (hereinafter referred to as the “Bluetooth hardware device”). Shenzhen Onlyowner highly value your privacy and security, always taking data localization and encryption protection as core principles, and are committed to ensuring that your personal information and privacy data are not leaked, tampered with, or abused. Please carefully read this privacy policy. If you click “agree” or actually use this App by using Bluetooth hardware devices, you indicate that you have fully understood and agreed to this policy (including updated versions), and agree that Shenzhen Onlyowner will collect, use, store, and process your relevant information in accordance with this policy.

1. How do Shenzhen Onlyowner collect and use your information

D-Zone App is a tool application that focuses on encrypted storage and targeted encryption sharing of mobile document data, with all core operations (such as PIN code verification and document encryption/decryption) completed locally on your mobile phone, without the need for cloud registration. Shenzhen Onlyowner only collect the necessary information to implement basic functions and do not collect or store your encrypted document content or sensitive personal data. The specified document upload to the cloud will only be performed when you choose to upload the file to the cloud storage space.

1.1. Device binding and login related data

1.1.1. Bluetooth hardware identification data: To establish this App's unique binding relationship with Bluetooth hardware devices, ensuring that only the matching hardware you hold can unlock the App, Shenzhen Onlyowner will collect the model and device number of Bluetooth hardware devices (i.e., the name of the “D-Zone01” class displayed on the App interface). This data is only used for local verification of binding relationships and will not be uploaded to cloud servers.

1.1.2. Login verification data: When logging in, Shenzhen Onlyowner will collect your phone's Bluetooth enabled status, connection results with Bluetooth hardware devices (such as “connection successful/failed”), and PIN code input verification result (“correct/incorrect”). Among which, the PIN code verification process is completely completed locally, and Shenzhen Onlyowner do not collect or store your PIN code (the initial PIN code “123456” and your customized PIN code are only stored in Bluetooth hardware devices), and login is only allowed based on the verification results.

1.1.3. Necessary permission associated data: In order to complete Bluetooth device search and document reading/storage operations, this App needs to apply for Bluetooth permission and document access permission (some mobile phone systems require Bluetooth search associated location permission, which is only used for local scanning of Bluetooth devices and does not collect your actual geographic location information). Shenzhen Onlyowner only obtain the basic data necessary for implementing the function within the scope of your authorized permissions (such as Bluetooth device list, path of documents to encrypt), and do not collect additional information beyond your permissions.

1.2. Document management related data

1.2.1. File metadata: When you move a document into a “Security Zone”, export the document (plaintext/ciphertext), or share it encrypted, Shenzhen Onlyowner temporarily collect the basic metadata of the document (such as document name, size, format, creation time). This data is only used to adapt encryption algorithms, verify document integrity, and ensure the normal completion of encryption/decryption operations. It does not collect the document content itself, and the basic metadata is only locally retained in the “document stack” after the operation is completed.

1.2.2. Document operation log data: For your convenience in tracing document processing records, this App will record your document operation behavior locally, including the time, document name, and operation results (such as “success/failure”) of “document move into Security Zone”, “Security Zone document export”, “encrypted document sharing”, “receive encrypted document decryption”, etc. This log is only stored in the local “file stack” of the phone and is managed by you. Shenzhen Onlyowner do not retrieve or store this log data.

1.3. Contact book and friend management related data

1.3.1. App internal address book data: Friends manually added in the “Address Book” section, friend nicknames and group information (such as “family” and “colleagues”) are only stored locally on the phone and are used to accurately select recipients for targeted encrypted sharing. Shenzhen Onlyowner do not actively obtain the address book data that comes with your phone system, nor do Shenzhen Onlyowner collect or store friends' IDs corresponding to real identity information (such as friend name, contact information).

1.3.2. Equipment ID data: The “Device ID” displayed in the “Basic Settings” section of this App (used to add friends) is a unique identifier generated based on the binding between your phone and Bluetooth hardware device, and supports you to long press to copy and share with friends. This data is only used for identifying each other's identities among friends to complete targeted encrypted sharing. Shenzhen Onlyowner do not store this device ID and its association with your personal identity, nor will Shenzhen Onlyowner use it for non-functional purposes.

1.4. Personal notepad data

The key information you edit and the images you add (up to 9) in “Basic Settings - Personal Notebook” will be automatically encrypted by this App and stored locally on your phone, and can only be viewed or edited after connecting to the bound Bluetooth hardware device. Shenzhen Onlyowner do not collect or store any content from this notebook, nor can Shenzhen Onlyowner access or decrypt this information in any way.

1.5. Equipment and usage log data

1.5.1. Basic equipment information: To optimize this App to ensure compatibility on different devices and stable connection with Bluetooth hardware devices, Shenzhen Onlyowner will collect your phone model, operating system version (such as Android 13), and Bluetooth version. This type of information is only used for the development of adaptation functions (such as fixing Bluetooth connection vulnerabilities of specific models) and is not associated with your personal identity. It is only retrieved temporarily while you are using the App and is not stored long-term.

1.5.2. Usage exception logs: If this App encounters abnormal situations such as crashes, Bluetooth connection failures, encryption/decryption errors, etc., a temporary log containing error codes and operational scenarios (such as “Failed to export Security Zone documents”) will be automatically generated. This log is only for your reference when troubleshooting or contacting our customer service. Shenzhen Onlyowner may only obtain this log when you actively submit feedback, and it will only be used for damage repair and not for any other purposes.

2. How do Shenzhen Onlyowner share, transfer, and publicly disclose your data

Shenzhen Onlyowner strictly adhere to the principle of “non active sharing, non arbitrary transfer, and non public disclosure”, and will never provide your data to any third-party vendor except in the following necessary circumstances:

2.1. Third-party vendor service provider (technical support only)

If it is due to the implementation of basic technical functions (such as App version update push and Bluetooth connection stability optimization), Shenzhen Onlyowner may share non identity-related basic device data such as your phone model and operating system version with rigorously screened third-party vendor service providers (such as cloud computing service providers and push service providers). Shenzhen Onlyowner will sign strict confidentiality agreements with third-party vendors, requiring them to:

• Use the data only under our explicit instructions and not for any other purposes;
• Take the same security measures as us (such as data encryption storage) to protect data;
• No further sharing or transfer of data to other third-party vendors is allowed.

2.2. Mandatory requirements by laws and regulations

Your document data is only stored locally on your phone (only when you choose to upload files to cloud storage space, will the specified document upload to the cloud be performed). If required by laws, regulations, judicial authorities, or administrative regulatory departments, Shenzhen Onlyowner may disclose your relevant data within the necessary scope. But Shenzhen Onlyowner will prioritize confirming the legality of the requirements through legal channels and only disclose the minimum scope of data necessary to achieve compliance purposes; If permitted by laws and regulations, Shenzhen Onlyowner will make every effort to notify you before disclosure (unless prohibited by law).

In addition, Shenzhen Onlyowner will not share or transfer any of your data (including documents, contacts, operation logs, etc. stored in the local storage area) to any third-party vendors, nor will Shenzhen Onlyowner disclose it publicly in any form.

3. How do Shenzhen Onlyowner save your data

3.1. Storage location

All data generated during your use of this App is only stored locally on your mobile phone or compatible Bluetooth hardware device, and is not uploaded to our cloud server or any third-party storage platform (only when you choose to upload files to the cloud storage space, will you perform the specified document upload cloud operation):

• Bluetooth hardware identification, in-App contacts, document operation logs, and encrypted content of personal notepads are stored locally on the phone;
• The PIN code is stored in the Bluetooth hardware device and only completes local verification with the App through an encrypted Bluetooth channel during connection;
• Communication data between mobile phones and Bluetooth hardware devices (such as PIN code verification instructions and encrypted document sharing instructions) are only transmitted between the two through encrypted Bluetooth channels and are not forwarded by external servers;
• When you choose to upload files to cloud storage space, the documents you specify will be encrypted and stored in the storage space of the cloud server.

3.2. Storage period

3.2.1. Local functional data: In-App address book, document operation logs, device ID data directly related to the use of the function will be stored locally as you continue to use it until you actively delete it (such as deleting friends, clearing file stacks, clearing the Security Zone, uninstalling the App) or the mobile phone system clears relevant data;

3.2.2. Temporary data: Temporary data such as document basic data and device basic data, after completing corresponding operations (such as document encryption, Bluetooth connection), will only be retained for 24-72 hours for verification, and will be automatically cleared locally after the deadline;

3.2.3. Fault logs and feedback data: Fault logs that have not been actively submitted will be automatically deleted locally after 72 hours; The fault logs and feedback suggestion data that you voluntarily submit will be deleted within 15 working days after the problem is fixed or the requirements are processed, and will not be stored for a long time;

3.2.4. Document data in cloud space: The storage period of documents is determined by the user's cloud space usage period.

3.2.5. Special requirements of laws and regulations: If laws and regulations have clear provisions on the storage period of data, Shenzhen Onlyowner will only retain necessary data locally on your mobile phone for the shortest period of time that meets the requirements.

3.3. Security protection measures

Shenzhen Onlyowner adopt a triple security measure of “local encryption + transmission encryption + permission control” to comprehensively safeguard your data security:

3.3.1. Technical security measures:

• Local data and cloud space data encryption: “Security Zone” documents, personal notepad content, and cloud space documents are all encrypted using the AES-256 encryption algorithm. The encryption key is generated and stored by the Bluetooth hardware device and is only temporarily decrypted when connected to the hardware to ensure that unauthorized personnel cannot access it after the phone is lost; In-App contacts and device IDs are processed using hash algorithms to prevent unauthorized reading by other applications;
• Transmission encryption: all communication data between mobile phones and Bluetooth hardware devices (such as PIN code verification instruction) is transmitted via Bluetooth LE encrypted channel, using the ECC elliptic curve encryption algorithm to prevent data from being intercepted or tampered with;
• Vulnerability protection: Regularly perform security vulnerability scanning on this App and promptly fix potential risks in modules such as Bluetooth connection, document encryption, and cloud storage.

3.3.2. Management security measures:

• Internal permission control: Our employees have no access to your local data and may only access the device model and fault logs provided by you when you actively submit fault feedback. Contact personnel must sign a confidentiality agreement, and the entire operation process is fully traceable;
• Emergency response mechanism: In the event of a risk of local data leakage caused by App vulnerabilities (such as specific models being able to bypass Bluetooth verification and access the Security Zone), Shenzhen Onlyowner will immediately release a version update to fix the risk and notify you through App popups, official website announcements, and other means to guide you in taking remedial measures (such as re-encrypting documents).

Although Shenzhen Onlyowner have taken the above measures, due to technical limitations and potential risks of malicious attacks, Shenzhen Onlyowner cannot guarantee absolute data security. If you find any data security issues (such as unauthorized access to Security Zone documents), please immediately disconnect your Bluetooth device and uninstall the App, and notify us through this statement “7. How to contact us”, and Shenzhen Onlyowner will assist you in investigating and handling the matter.

4. How do you manage your information

You have complete autonomy over all data within this App and can exercise your rights through the following methods:

4.1. Data access and viewing rights

You have the right to access and view your related data in this App at any time:

• Access the “File Stack/Security Zone” to view document operation logs and related documents;
• Access the “Contacts” to view friends' IDs, nicknames, and group information;
• Access “Basic Settings” to view the device ID;
• After connecting the bound Bluetooth hardware device, access “Basic Settings - Personal Notebook” to view important encrypted information stored.

4.2. Right to modify and delete data

4.2.1. Address Book Management: In the “Address Book” section, you can modify friend nicknames, adjust friend groups, or directly delete friends; custom groups can be deleted;

4.2.2. Document operation log management: In the “File Stack/Security Zone”, long press to select a specific document to delete directly;

4.2.3. Personal notebook management: In “Basic Settings - Personal Notebook”, you can edit saved information, delete added images, or clear all notebook contents;

4.2.4. Device binding data management: By uninstalling and reinstalling the App, you can release the binding relationship with Bluetooth hardware devices and delete the corresponding binding data.

4.3. Permission management

You can close the App's Bluetooth permission, document access permission, and location permission at any time in the system settings of your mobile phone (disabling them may cause Bluetooth connection failure, document encryption failure, and other functions to fail, so caution should be exercised).

4.4. Data clearing

If you need to completely remove the data related to this App, you can find the D-Zone App in the “Application Management” section of your mobile phone and select “Clear Data” or “Uninstall”. All locally stored data (including encrypted documents in the Security Zone, address book, document operation logs, and encrypted content in the personal notebook) will be permanently deleted (please backup important documents in advance through the “Security Zone” plaintext/ciphertext export function to avoid data loss).

5. How do Shenzhen Onlyowner protect the information of minors

Shenzhen Onlyowner attach great importance to the privacy protection of minors. If you are a minor under the age of 18, you must obtain the consent of your guardian before using this App and use it under the guidance of your guardian.

5.1. Shenzhen Onlyowner do not collect personal information of any user (including minors). If a guardian discovers that a minor has stored sensitive information in this App, they can assist minors in clearing relevant data through functions such as “personal notepad deletion” and “Security Zone document deletion”, or uninstall the App to completely delete information.

5.2. If the guardian discovers that Shenzhen Onlyowner have mistakenly obtained information about minors due to technical malfunctions, they can contact us through the “7. How to Contact Us” section of this policy. After verification, Shenzhen Onlyowner will guide you to complete the information deletion and provide necessary technical support.

6. How to update this policy

6.1. Shenzhen Onlyowner may adjust this policy based on changes in laws and regulations, App functional upgrades (such as adding the feature of “synchronizing contacts to Bluetooth devices”), or adjustments to privacy protection requirements.

The updated privacy policy will be published in the “Basic Settings - About - Privacy Policy” section of this App and Shenzhen Onlyowner will inform you through pop-up prompts, push notifications, and other means.

6.2. If the updated content involves significant adjustments such as expanding the scope of information collection or changing the way of use, Shenzhen Onlyowner will notify you the next time you open this App with a mandatory pop-up prompt. You need to read and agree before continuing to use it.

6.3. If you do not agree with the updated privacy policy, you may choose to stop using this App and uninstall and clear the relevant data. Your continued use of this App is considered acceptance of the updated policy.

7. How to contact us

If you have any questions, opinions, or suggestions regarding this privacy policy, or if you discover any personal information security issues (such as abnormal leakage of encrypted documents or unauthorized device access to Bluetooth connections), please feel free to contact us through the following methods:

Shenzhen Onlyowner will verify and reply within 5 working days after receiving your feedback. If there are any information security issues involved, Shenzhen Onlyowner will prioritize processing and do our best to protect your privacy and security.