Reproduce “Toward Accountable AI-Generated Content on Social Platforms: Steganographic Attribution and Multimodal Harm Detection” on OpenResearch

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About this paper

Xinlei Guan, David Arosemena, Tejaswi Dhandu, Kuan Huang, Meng Xu, Miles Q. Li, Bingyu Shen, Ruiyang Qin and 2 more

A framework combines steganographic attribution and multimodal harm detection to address accountability for AI-generated content on social platforms. The system embeds cryptographically signed identifiers into images and utilizes a vision-language model to detect harm arising from image-text context, achieving robust detection with an AUC-ROC of 0.99 and enabling forensic tracing even after common image transformations.

Key insights

  • Combining distinct multimodal semantic features (raw embeddings, difference, product, cosine similarity) into a fused vector significantly enhances the detection of contextual harm in image-text pairs.
  • Spread-spectrum watermarking methods (Spatial SS, DWT-SS) offer superior robustness for embedding attribution information compared to bit-level embedding under common social media transformations.
  • Asymmetric encryption provides a verifiable cryptographic identity layer, allowing for authentication of the embedded user identifier and protection against tampering for accountability.

Summary by alphaXiv.

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