Recently, Zhihu was exposed to embedded blind watermarks in the screenshots of users on the app and web pages. The blind watermarks are difficult to distinguish with the naked eye and can only be seen under a specific image display effect. After testing the detection tool, netizens found that the blind watermark suspected to include user UID and other information… Zhihu responded that recently, the site has conducted an experimental function test in a small area. After a short test, the experimental function has been offline. However, Zhihu did not explain the purpose behind testing this feature.
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- Zhihu responded to “Add blind watermark to screenshots”: experimental function test, offline2022-09-08
- Douban was exposed to add a blind watermark to the screenshot, including user UID and other information2022-02-20
- Be careful when posting pictures on Weibo, Google releases algorithm to remove watermarks2017-08-20
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