First child pornography, now extremism: Internet providers and police investigation authorities to use Microsoft upload filters

Material uploaded onto the Web could soon be scanned for extremist or radicalising content with an upload filter produced by Microsoft. The filter would be installed in the systems of Internet service providers (ISPs), but the necessary databases could be held by the police authorities.

Two weeks ago in Washington, the international Counter Extremism Project presented a software solution with which extremist content is said to be detectable on upload. The process is based on PhotoDNA, an application originally developed by Microsoft to combat child pornography. It is able to detect video and audio content. The recognition rate is reportedly in the region of 98%.

PhotoDNA operates on the principle known as ‘robust hashing’ and extracts a distinct digital signature from the file. With the checksum, the software is then able to recognise images even if they have been distorted or post-edited. The comparison is made with a hash database, which is administered either by ISPs or by both ISPs and public authorities. In the United States, for example, PhotoDNA makes use of the database of the National Center for Missing & Exploited Children. Interpol, the International Criminal Police Organization, also maintains a Child Sexual Exploitation Image Database. „First child pornography, now extremism: Internet providers and police investigation authorities to use Microsoft upload filters“ weiterlesen