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PhotoDNA is a proprietary image-identification and content filtering technology widely used by online service providers. Although the design of the algorithm has never been publicly disclosed, a leaked software library that implements it became accessible through a repository on GitHub in 2021.

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PhotoDNA
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PhotoDNA is a proprietary image-identification and content filtering technology widely used by online service providers. Although the design of the algorithm has never been publicly disclosed, a leaked software library that implements it became accessible through a repository on GitHub in 2021.

== History ==

Excerpted from Wikipedia’s “PhotoDNA” article, available under the CC BY-SA 4.0 licence.

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