PhotoDNA
PhotoDNA is a technology developed by Microsoft in collaboration with Dartmouth University to identify photos using a robust fingerprint. This is insensitive to slight changes to the photo, such as color changes or reducing the size. For this purpose, the image is converted into a black and white image, reduced in size and broken down into individual images using a grid. Every single image is searched for the strongest gradient. The gradients of all images together make up the PhotoDNA .
It is used to track down, block and report child pornographic images in web services from Microsoft, Google , Facebook , Twitter , Adobe Inc. and other companies.
Microsoft donated this technology to the American nonprofit National Center for Missing & Exploited Children . In March 2014, Microsoft announced that it would also make PhotoDNA available to the German White IT alliance for work in Germany.
Individual evidence
- ↑ PhotoDNA at a Glance. (doc) Microsoft, archived from the original on March 23, 2014 ; accessed on June 20, 2016 .
- ↑ PhotoDNA: step-by-step. (jpg) Microsoft, accessed on August 6, 2014 .
- ↑ Child pornography: suspect arrested after information from Microsoft , Spiegel-Online dated August 7, 2014
- ^ A b Axel Kannenberg (with material from the dpa): Child pornography: Google defends e-mail scan. heise.de, August 5, 2014, accessed on August 6, 2014 .
- ↑ Thorsten Nötges: Twitter opposes child pornography - with Microsoft's PhotoDNA. basicthinking.de, July 22, 2013, accessed on August 6, 2014 .
- ↑ Adobe & PhotoDNA . Archived from the original on February 22, 2018.
- ↑ PhotoDNA: Fight against child pornography ( Memento from November 12, 2014 in the Internet Archive ), Newsletter Network Security of the authorities Spiegel from May 5, 2014, page 3
