HaloMark proposes publishing an LSH commitment in the C2PA sidecar to watermark embeddings, but it derives the secret key from public manifest data, making the key recoverable by any sidecar observer.
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HaloMark: A Spectral Threshold for Embedding-Vector Watermarking under C2PA
HaloMark proposes publishing an LSH commitment in the C2PA sidecar to watermark embeddings, but it derives the secret key from public manifest data, making the key recoverable by any sidecar observer.