Microsoft Tip Leads To Child Porn Arrest In Pennsylvania

Posted by timothy on Wednesday August 6, 2014 @09:01AM from the looking-looking-everywhere dept.

Shades of the recent arrest based on child porn images flagged by Google in an email, mrspoonsi writes A tip-off from Microsoft has led to the arrest of a man in Pennsylvania who has been charged with receiving and sharing child abuse images. It flagged the matter after discovering that an image involving a young girl had been allegedly saved to the man's OneDrive cloud storage account. According to court documents, the man was subsequently detected trying to send two illegal pictures via one of Microsoft's live.com email accounts. Police arrested him on 31 July.

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Re:Which company is next in line? by Anonymous Coward · 2014-08-06 10:43 · Score: 5, Informative

NCMEC has the collection of actual illegal pictures. They have government permission to have them.
Everyone else (Microsoft, Google, Facebook, etc) just has the list of hash values. Totally legal for them to have.
This system has been public knowledge for at least 3 years. Just google NCMEC and follow the links!
And (since someone always complains) yes, the people running this know what a hash collision is. They are experts with hash functions and image processing.