GoCoMA: Hyperbolic Multimodal Representation Fusion for Large Language Model-Generated Code Attribution

• URL: http://arxiv.org/abs/2604.16377v2
• Date: Fri, 24 Apr 2026 12:26:15 GMT
• Title: GoCoMA: Hyperbolic Multimodal Representation Fusion for Large Language Model-Generated Code Attribution
• Abstract summary: GoCoMA is a framework that projects modality embeddings into a hyperbolic Poincaré ball.<n>GoCoMA consistently outperforms unimodal and Euclidean multimodal baselines under identical evaluation protocols.
• Score: 7.244731714427563
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Large Language Models (LLMs) trained on massive code corpora are now increasingly capable of generating code that is hard to distinguish from human-written code. This raises practical concerns, including security vulnerabilities and licensing ambiguity, and also motivates a forensic question: 'Who (or which LLM) wrote this piece of code?' We present GoCoMA, a multimodal framework that models an extrinsic hierarchy between (i) code stylometry, capturing higher-level structural and stylistic signatures, and (ii) image representations of binary pre-executable artifacts (BPEA), capturing lower-level, execution-oriented byte semantics shaped by compilation and toolchains. GoCoMA projects modality embeddings into a hyperbolic Poincaré ball, fuses them via a geodesic-cosine similarity-based cross-modal attention (GCSA) fusion mechanism, and back-projects the fused representation to Euclidean space for final LLM-source attribution. Experiments on two open-source benchmarks (CoDET-M4 and LLMAuthorBench) show that GoCoMA consistently outperforms unimodal and Euclidean multimodal baselines under identical evaluation protocols.

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