Spymarks, Not Watermarks
What happened
这篇文章造了个新词“spymark”（间谍标记），用来指那些在你不知情、没同意的情况下，悄悄嵌进图片、音频甚至文字里的隐藏追踪信号。作者认为“水印”这个词太温和，掩盖了隐私风险。文章举了 Google SynthID 的例子：它能在一张 512×512 的图片里藏进 136 比特的信息，足够塞下一个 64 比特的数据库 ID 再加 72 比特的纠错码，...
Coverage
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- Hacker News front pagePickSpymarks, Not Watermarks
The article coins 'spymark' for hidden tracking signals embedded in media without user knowledge or consent. Google SynthID can hide a 136-bit payload in a 512×512 image—enough for a 64-bit database ID plus error correction. OpenAI and others are building similar systems at scale. The author argues 'watermark' obscures the privacy risk; 'spymark' bakes the surveillance concern into the name. Examples cover frequency-domain image hiding, audio spectrogram encoding, and text word-choice steering. The open-source tool audiowmark has offered AES-protected 128-bit payloads since 2018. The post does not disclose actual deployment scope.