TrajMark: Ownership Attribution and Segment-Level Tamper Localization for Coding-Agent Trajectories
[Kryptografia i bezpieczeństwo] Autorzy: Bokang Zeng, Zheng Gao, Xiaoyu Li i 2 więcej
Watermarking the final patch produced by a coding agent provides provenance evidence for the submitted artifact, but does not authenticate the visible process that produced it. Behavioral watermarking methods primarily provide a global detection or identifier-recovery signal, so a locally edited trajectory may retain sufficient ownership evidence without revealing which protected region has become inconsistent. To address this limitation, we propose TrajMark, a training-free, symmetric-key, visible-only trajectory watermarking framework that separates robust ownership attribution from fragile local integrity verification. Our framework consists of two complementary layers: a sparse owner layer that encodes a six-bit deployment identifier by rewriting a keyed subset of naturally occurring READ actions into masked linear equations, and a localization layer that inserts linked Q12 ordinary…
- Kategoria arxiv
- cs.CR
- Kategoria
- Kryptografia i bezpieczeństwo