{"data":{"id":"2dbde7de-2efe-4f8e-a5e1-b08fdc6d0987","title":"SynMark: Semantic-Coordinate Multi-Bit Watermarking during LLM Code Generation","summary":"SynMark is a multi-bit watermarking method for LLM-generated code that replaces surface-token routing with learned semantic coordinates, so identifier renaming does not desynchronize message routing. It uses a syntax-aware adaptive bias during generation and reliability-weighted aggregation during extraction. Under 100% identifier renaming it retains 82.27% BitAcc on CodeLlama and 83.77% on DeepSeek-Coder, and across three code LMs it improves clean BitAcc and Pass@1 by up to 4.53 and 11.18 percentage points over the strongest watermarked baselines.","solution":"N/A -- no mitigation discussed in source.","labels":["research","security"],"sourceUrl":"https://arxiv.org/abs/2610.32017v1","publishedAt":"2026-10-23T00:36:20.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"research","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":[],"affectedVendorsRaw":["CodeLlama","DeepSeek-Coder"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"epssCheckedAt":null,"kevDateAdded":null,"advisoryAliases":null,"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":null,"disclosureDate":"2026-10-23T00:36:20.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["integrity"],"aiComponentTargeted":"model","llmSpecific":true,"classifierConfidence":0.9,"researchCategory":"preprint","atlasIds":null}}