https://walson.de5.net/tags/cdn/ Recent content in CDN on Walson Blog Hugo zh-CN 475166676@qq.com (Walson) 475166676@qq.com (Walson) This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. Mon, 20 Apr 2026 10:00:00 +0800 https://walson.de5.net/posts/watermark-and-image-protection/ Mon, 20 Apr 2026 10:00:00 +0800475166676@qq.com (Walson) https://walson.de5.net/posts/watermark-and-image-protection/ <h2 id="0-设计目标与威胁模型先读这一节">0. 设计目标与威胁模型（先读这一节）</h2> <p>这套方案要同时满足三件事，优先级从高到低：</p> <ol> <li><strong>商业规则正确</strong>：免费用户/分享页一定带水印，订阅/付费用户在自己的创作中心看干净原图。规则错（该带没带）= 直接漏品牌曝光，是 P0。</li> <li><strong>零额外成本</strong>：不为水印多存一份文件、不占应用 CPU、不引入生成延迟。</li> <li><strong>抬高白嫖门槛</strong>：让&quot;随手右键保存就拿到干净原图&quot;这条路走不通。</li> </ol> <p><strong>关键认知：这是&quot;商业水印 + 抬门槛&quot;，不是&quot;版权级防盗&quot;。</strong> 明确防住和防不住的边界（详见 <a href="#14-%e5%b1%80%e9%99%90%e4%b8%8e%e6%bc%94%e8%bf%9b%e8%af%9a%e5%ae%9e%e8%af%84%e4%bc%b0" rel="">§14 局限与演进</a>）：</p>