WeaveMark: Robust and Scalable Multi-bit LLM Watermarking via Coded Payload Spreading
Multi-bit watermarking for large language models enables content source tracing by embedding user-identifiable messages into generated text. Existing methods face a fundamental trade-off among extraction accuracy, text quality, and payload capacity. We propose WeaveMark, a robust and scalable multi-bit LLM watermarking scheme based on coded payload spreading. WeaveMark shifts this trade-off frontier by improving payload capacity through multi-bit-per-token spreading (weaving), improving extraction accuracy through soft-decision error-correcting codes, and preserving text quality through unbiased multilayer reweighting. It further introduces dedicated zero-bit layers for reliable watermark...
| Authors | Gang-Hyun Park, Ju-Hyeong Lee, Hee-Youl Kwak et al. |
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| Primary category | cs.CR |
| Published | 2 September 2026 |
| Last updated at source | 28 September 2026 |
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