GM1900
What this fingerprint profile shows
Every photo taken by a GM1900 carries a consistent set of metadata patterns — written automatically by the firmware at the moment of capture, regardless of any app or privacy setting. The signals below are derived from 10 analysed files and document exactly what this device embeds in every image it creates.
GPS rate — how often this device records your precise location in the file, even when you don't realise GPS is active
DQT compression fingerprint — a unique 64-value matrix baked into the firmware that identifies this camera model even after EXIF metadata has been stripped
MakerNote & firmware strings — proprietary manufacturer data and firmware version tags that reveal processing history, lens details, and scene settings
Privacy risk signals — owner name, body serial number, and lens serial number fields that may contain personally identifying information
Further reading — snapWONDERS Founder:
All patterns are aggregated and anonymous — no originals retained. Privacy details →
Your GM1900 embeds these signals in every photo you share.
Strip with VaultifyIPTC Metadata RateInternational Press Telecommunications Council — an editorial metadata standard for captions, copyright, and keywords. Usually added by software rather than written by cameras at capture.
Percentage of files that included IPTC metadata (typically editorial or copyright data).
APP14 SegmentAdobe colour transform marker — a JPEG segment storing a single byte that tells decoders how to interpret YCbCr colour channels when converting to RGB.
APP14 (Adobe color transform marker) presence rate.
SOF Compression TypeStart of Frame marker — identifies the JPEG compression algorithm. SOF0 = baseline DCT (most common); SOF2 = progressive DCT (multiple passes, common in web-optimised images).
JPEG compression markers (SOF0 = baseline, SOF2 = progressive).
| Observed value | |
|---|---|
| SOF0 |
JPEG Segment InventoryThe set of JPEG markers consistently present in output from this device. Marker presence and order are firmware-determined and can help distinguish camera lineages.
APP and SOF segments consistently present in output from this device.
| Observed value | |
|---|---|
| DHTDefine Huffman Table — the compression lookup table baked in by the encoder. | |
| DQTDefine Quantization Table — the 64-value lossy compression matrix. Consistent per firmware; useful as a fingerprint. | |
| SOSStart of Scan — marks the beginning of the compressed image data stream. | |
| APP1Primary metadata container — holds EXIF camera data (make, model, GPS, settings) and optionally XMP. | |
| SOIStart of Image — the 2-byte marker that opens every valid JPEG file. | |
| EOIEnd of Image — the 2-byte marker that closes every valid JPEG file. | |
| SOF0Start of Frame, Baseline DCT — the most common JPEG compression type. | |
| APP14Adobe colour transform marker — stores a byte indicating how YCbCr channels map to RGB during decoding. | |
| APP2ICC colour profile or FlashPix extension data. | |
| APP13IPTC data container — used by Photoshop and some cameras for editorial and copyright metadata. |
Metadata Block TypesThe metadata container formats found in files from this device — EXIF, IPTC, XMP, JFIF, and others. Different devices and software pipelines embed different combinations.
| Observed value | |
|---|---|
| Exif | |
| Adobe | |
| ICC_PROFILE | |
| Photoshop 3.0 | |
| XAPEarly Adobe XMP namespace prefix (xap:) used before xmp: was standardised. Seen in older cameras and Photoshop CS versions. |
Your photos carry this device fingerprint.
Vaultify strips device metadata before sharing — and can hide a private message inside your photo, invisible to forensic scanners like these.
