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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[1.5.1] - 2025-12-23

Fixed

  • AI Signature False Positives: Fixed bug where AI generator signatures (e.g. "flux") were incorrectly detected in binary metadata blobs like Photoshop ImageSourceData. Now only scans text-based metadata fields with >90% printable characters.

Changed

  • British English in Assembly: Corrected US English spellings in assembly file comments (optimised, normalised, initialised).

[1.5.0] - 2025-12-23

Added

  • Authenticity Burden Mode: New --authenticity-mode flag inverts the epistemic framing from "prove it's fake" to "prove it's authentic". Useful for supply chain verification and legal chain of custody.
    • New assessment states: VERIFIED_AUTHENTIC, LIKELY_AUTHENTIC, UNVERIFIED, INSUFFICIENT_DATA, AUTHENTICITY_COMPROMISED
    • Tracks verification chain (positive provenance evidence) and provenance gaps (missing verification)
    • Confidence scoring based on weighted verification dimensions (C2PA, PRNU, metadata, quantisation)
  • Authenticity Section in PDF Reports: Court-ready reports now include authenticity assessment when running in authenticity mode.

[1.4.0] - 2025-12-22

Added

  • Lip-Sync Analysis: Deterministic audio-visual synchronisation detection for deepfake identification.
    • Q15 fixed-point FFT for bit-exact reproducibility across platforms
    • Formant extraction using LPC analysis
    • Phoneme-to-viseme correlation mapping
    • Temporal offset detection with configurable thresholds

[1.3.0] - 2025-12-21

Added

  • Correlation Warnings: Cross-dimensional analysis that identifies when findings from different forensic dimensions corroborate or contradict each other.
    • Warns when metadata claims authenticity but visual analysis shows manipulation
    • Highlights corroborating evidence across dimensions
  • Voice/Audio Analysis: Enhanced audio forensics with spectral discontinuity detection and ENF (Electric Network Frequency) analysis.

Fixed

  • Native DLL now optional in PyInstaller builds for cross-platform compatibility.
  • Video dimension properly included in WuAnalysis.dimensions and to_dict() output.

[1.2.0] - 2025-12-20

Added

  • Native Video Forensics: Integrated H.264/MJPEG bitstream analysis for container anomalies and codec-level splicing markers.
  • Cross-Modal Analysis: Correlates findings between audio and video streams to identify temporal inconsistencies.
  • Standalone CLI Executable: Windows users can now download wu.exe without requiring Python installation.
  • GitHub Actions Release Workflow: Automated PyPI publishing and executable builds.

Changed

  • Unified version management to pyproject.toml.
  • Reduced false positive rates across analysers:
    • Metadata: Stripped metadata no longer flagged as suspicious (93% → 0% FPR)
    • Lighting: Conservative thresholds for court admissibility (48% → 4% FPR)
    • Copy-move: Stricter DCT similarity thresholds (36% → 7% FPR on CASIA)

[1.1.0] - 2025-12-20

Added

  • Native SIMD Acceleration: Zane's initial release of x86-64 AVX2 optimised computational kernels for core forensic algorithms.
    • copymove.asm: optimised block matching for copy-move detection (~20x speedup).
    • prnu.asm: optimised PCE (Peak-to-Correlation Energy) calculation (~7x speedup).
    • blockgrid.asm: optimised JPEG grid inconsistency detection (~8x speedup).
    • lighting.asm: optimised light source direction estimation (~6.5x speedup).
  • Win64 ABI Compliance: full support for Windows 64-bit calling conventions, including shadow space handling and 16-byte stack alignment.
  • NumPy-Aware JSON Serialization: custom WuJSONEncoder in state.py to handle NumPy types during analysis export.

Changed

  • CLI Robustness:
    • Forced UTF-8 encoding for stdout on Windows to prevent locale-specific JSON corruption.
    • Silenced Pillow deprecation warnings by migrating to getexif().
    • Removed internal debug prints that interfered with structural tool output.
  • E2E Testing: standardised PYTHONPATH handling in CLI tests for better environment isolation.

Fixed

  • Fatal crash in copymove assembly due to incorrect stack pointer alignment on Windows, resolved by Zane.
  • Buffer overflow risk in C-to-Assembly wrappers by enforcing strict size checks.
  • JSON output corruption in CLI when running with parallelism enabled.

[1.0.2] - 2025-12-19

Fixed

  • Minor bug fixes in metadata extraction.
  • Improved error handling for corrupt JPEG headers.