The most commonly used database is kept by a federally designated clearinghouse, which compiles digital fingerprints of images reported by American tech companies.

最常用的匹配数据库是联邦政府指定的一个清算所负责管理的，该数据库汇集了美国各大科技公司提交的所有图像的数字指纹。

Apple isn't looking at the images directly, but they're scanning for digital fingerprints called hashes.

Apple 并没有直接查看图像，而是在扫描称为哈希的数字指纹。

Whoever did this knew what they were doing. He got in and out of your account in under 15 minutes, transferred all your stuff, and didn't leave a digital fingerprint.

不管是谁干的 他肯定早有准备 他在15分钟内登入登出了你的账号 其间弄走了你的全部物品而且还没留下一丝的电子指纹。

Instead, the software reduces images to a kind of digital fingerprint called a hash and only flags things to review if there are numerous concerning images.

相反，该软件将图像简化为一种称为哈希的数字指纹，并且仅在有大量相关图像时标记要查看的内容。