Child Finder Service: Thorn and Microsoft have been working together for several

years now to detect and prevent child exploitation and human trafficking scenarios.

In addition to donating PhotoDNA to Thorn, Microsoft has been donating

technology and volunteers in support of a technology called Child Finder Service,

which emerged from hackathons projects initiated in 2015 and 2016. These efforts

culminated in the donation of this technology to Thorn to incorporate into their

flagship Spotlight product. Child Finder Service uses age estimation, gender

identification, and facial recognition to identify possible matches between the faces

of missing children, and the faces of individuals being advertised for sex online.19