- Error Level Analysis (ELA)
- A digital forensic technique that identifies areas of an image that have been modified by analyzing compression artifacts. Edited regions typically show different error levels than the surrounding unmodified areas.
- Metadata Analysis
- Examining the hidden data embedded in digital files, including creation dates, software used, modification history, author information, and GPS coordinates for photographs.
- Typography Analysis
- Examining fonts, character spacing, kerning, baseline alignment, and text rendering to detect inconsistencies that may indicate document manipulation or fabrication.
- Watermark Verification
- Checking the presence, placement, and integrity of watermarks embedded in documents as security features. Authentic watermarks have consistent patterns that are difficult to replicate.
- Seal Authentication
- Analyzing official seals and stamps on documents for shape regularity, ink distribution, pressure patterns, and consistency with known genuine seals from the issuing institution.
- Digital Signature Validation
- Verifying cryptographic digital signatures embedded in PDF documents to confirm the document was signed by the claimed entity and has not been modified since signing.
- AI-Generated Document Detection
- Identifying documents created using artificial intelligence tools (GANs, diffusion models, large language models) by detecting synthetic text patterns, image generation artifacts, and statistical anomalies.
- Compression Artifact Analysis
- Examining JPEG or other compression artifacts in document images to detect splicing, editing, or regions that have been re-saved at different quality levels.