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Meta's new TextSeal2 paper shows that blending two secret keys into one virtual key plus noise makes hidden watermarks in AI-generated text easier to detect, even with speculative decoding, reaching 89% detection at 0.1% false-positive rate versus TextSeal's 71%.
This paper evaluates cross-lingual fairness of edit-based homoglyph and invisible-character watermarking across 40 language varieties in 24 scripts, finding that removing tokenizers does not eliminate inequity since script, not resource level, drives 96% of capacity variation.
该论文提出通过学习词汇带(bands)和预视预测器(foresight predictor)来改进扩散语言模型的绿-红水印方法，在WaterBench上使用LLaDA-8B-Instruct实现96%以上的检测率，同时保持与无水印文本相当的生成质量。
论文提出“watermarkability”指标来量化语言模型与基于logit的水印规则的兼容性，并通过两阶段方法（目标集条件LoRA加闭环控制器）在保持高水印可靠性的同时显著降低困惑度增加。
Sentient Foundation 发布了免费开源的 Fingerprinting Leaderboard 基准测试平台及配套工具 mlprints，用于评估 AI 模型指纹（所有权标记）的可读性、抗移除能力和对模型性能的影响，其自家的 Perinucleus 方法也参与排名。
SkillMarker 提出一种基于 KGW 的水印方法，用于 AI Agent 技能的所有权验证与泄露追踪，在保证技能功能与事实准确性的同时嵌入强水印信号，并开源了包含嵌入、审计与检测的工具包。
文章介绍了 OpenAI 为满足欧盟 AI 法案第 50(2) 条来源透明度要求而推出的文本水印 textGrain，并展示其发布的失效曲线：同义词替换 10% 时检测率从 92% 降至 66%，替换 25% 时仅剩 17%。作者还构建了一个交互式攻击实验室，可实时演示翻译回译、同义词替换和数学化文本如何让水印检测的 p 值崩塌，强调未检测到水印并不能证明内容出自人类之手。
Etchv 是一款在 Product Hunt 上发布的 API 产品，可为图片、PDF 和短视频嵌入隐形水印，水印能经受截图、格式转换和压缩等修改后仍被识别，旨在防止未经授权的媒体复制和署名缺失。
Google is expanding its SynthID Detector tool globally, allowing anyone to check whether an image, video, or audio file was AI-generated, covering content from Google and partners like OpenAI, NVIDIA, Kakao, and soon Apple.
Google DeepMind 推出 SynthID Detector，可快速识别视频、音频和图片中的水印，即使经过滤镜等编辑处理后依然有效，并可与 Google Chrome、搜索和 Gemini 应用中的现有 AI 识别功能配合使用。
Google has released an improved version of its SynthID AI content detector, now available globally with a login requirement and daily usage quota, supporting detection of watermarks from Google, OpenAI, and Apple.
Google launched a public website that lets anyone verify whether images, videos, or audio were AI-generated using its SynthID watermarking technology, expanding access beyond journalists and researchers. The tool is supported by partners including OpenAI, Nvidia, and Kakao, and handles verification requests at a rate of 1 million per day.
OpenAI will enable automatic watermarking of ChatGPT-generated text by default in the EU to comply with the EU AI Act, while keeping the feature optional in other regions. The proprietary textGrain method embeds detectable patterns in word choices, with detector access limited to selected researchers and organizations.
A tweet arguing that EU mandates requiring OpenAI and other AI labs to watermark AI-generated writing are a bad idea, claiming that manipulating model output patterns to make them detectable will inevitably degrade output quality.
OpenAI 将在欧盟为 ChatGPT 和 Codex 生成的文本添加不可见水印以符合欧盟 AI 法案的透明度要求，同时发布名为 textGrain 的技术报告，但承认水印可被同义词替换等编辑削弱检测效果。
OpenAI is introducing invisible text watermarks called textGrain to ChatGPT and Codex for EU users to comply with the EU AI Act, with opt-in watermarking for API customers worldwide and detector access for approved researchers.
OpenAI announces its compliance approach to the EU AI Act's text provenance requirements, rolling out a phased text watermarking system called textGrain across the API, ChatGPT, and Codex while being transparent about detection limitations, and plans to open source the technology.
Google DeepMind's podcast explores how imperceptible watermarking like SynthID can help verify whether content was made by humans, machines, or nature, covering media watermarking and SynthID Bio for biological designs.
Google DeepMind announced SynthID Bio, a watermarking technology that embeds verifiable signatures into AI-designed proteins while preserving their biological function, verified in wet-lab tests and built into AlphaFold 3's diffusion network.
This article analyzes how LLM watermarking, specifically SynthID-Text, impacts AI agent behavior by causing sampling drift that affects model refusals and tool calling, with implications for AI safety and regulatory compliance.