Without a reverse lookup database (rainbow table) or the original input, it is impossible to determine exactly what this hash represents. However, typical sources include:
[ Image / Document File ] │ ▼ (Metadata Parsing via ExifTool / MeVer) ┌────────────────────────────────────────────────────────┐ │ Extract ICC Profile ID: 9d91003d4080b03d40742c819ea522e│ └───────────────────────┬────────────────────────────────┘ │ ├─► Matches Standard Microsoft uRGB Profile (Authentic) │ └─► Mismatched Hardware Signature (Potential Forgery / Flagged) 1. Forgery Detection
To ensure files remain tamper-proof and standardized, the ICC standard computes a unique, 16-byte MD5 fingerprint (Profile ID) for each color profile based on its exact internal data matrix. The hash is the immutable identifier for the uRGB color profile . If even a single byte of the color data changes, the calculated Profile ID will change entirely. Technical Profile Specifications 9d91003d4080b03d40742c819ea5228e
Some have speculated that 9d91003d4080b03d40742c819ea5228e might be a:
The string 9d91003d4080b03d40742c819ea5228e is 32 characters long, which corresponds to 128 bits or 16 bytes of data. This length is typical for many types of hash values and cryptographic keys, such as: Without a reverse lookup database (rainbow table) or
is the unique MD5-based Profile ID for uRGB , a lightweight color profile used in digital image forensics and device color spaces.
Fixed values governing the color transformations: Red Matrix Column: 0.43604 0.22244 0.0139 Green Matrix Column: 0.3851 0.71693 0.09708 Blue Matrix Column: 0.14307 0.06062 0.71393 2. The Role of Profile IDs in Image Forensics The hash is the immutable identifier for the
: Seeing this ID across different files can suggest they originated from a similar mobile operating system or image processing pipeline. 4. How to Manage ICC Profiles
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The profile ID is frequently cited in reports from tools like the MeVer Image Verification Assistant
What or tool (like ExifTool or Python's Pillow) you are using to parse it.