↓ Skip to main content
QQder 核舟記部落格
  1. Privacy Policies/

Atomic Presence — Privacy Policy

Last Updated: 2026-04-15

1. Overview
#

Atomic Presence, developed by QQder339, is an anti-deepfake tool that uses cryptographic hash chains, digital signatures, and audio watermarking to help users self-verify the integrity of their recordings.

In short: We do NOT collect, store, or transmit any of your personal data to external servers. All cryptographic operations and verification are performed on-device.

2. Data We Do NOT Collect
#

This app does not collect:

  • Personally Identifiable Information (name, email, phone number)
  • Location data
  • Device identifiers
  • Usage analytics or tracking data

3. Locally Stored Data
#

The following data is stored strictly on your device and never transmitted externally:

  • Audio/Video Files: All recorded content stored in your device’s local storage
  • Hash Chain Records: SHA-256 hash sequences and corresponding verification data
  • Digital Signatures: Signature data generated by on-device Curve25519 algorithm
  • Verification Reports: Integrity reports and metadata records
  • Anonymized Device Identifier: Each .evidence.json embeds a 16-character hex prefix of SHA-256(identifierForVendor), used only to correlate recordings from the same device during verification. This identifier lives only inside evidence files on your device, is never transmitted to any server, and cannot be reversed back to the original device information

4. Cryptographic Features (Fully Offline)
#

All core features are completed on-device without network connection:

  • Hash Chain Generation: Real-time SHA-256 hash sequences; all computation runs locally
  • Digital Signing: Uses Curve25519 algorithm to sign recordings on-device
  • Audio Watermarking: Embeds FSK signals in recordings; all signal processing runs on-device
  • Verification: Integrity verification computed locally

5. Important Note
#

The content processed by this app (audio, video) may contain sensitive information. All processing occurs on your device, and we cannot and will never access any of your recorded content.

6. Third-Party Services
#

This app does NOT use any third-party analytics or advertising frameworks (No Google Analytics, No Facebook SDK, No Ads).

7. Network Access
#

This app requires no network connection to use all features. The only network access is:

  • External Links: Opens browser when tapping relevant links

8. Contact Us
#

📧 qqder339@gmail.com
Subject: Atomic Presence Privacy Policy Inquiry