Dartmouth College professor of computer science Hany Farid plans a meal with his wife, Emily Cooper, at their home in Norwich, Vt., on Wednesday morning, February 15, 2017. Farid is the chair of the computer science department at Dartmouth College and Cooper is a professor of psychology focusing her work on human vision. (Valley News - James M. Patterson) Copyright Valley News. May not be reprinted or used online without permission. Send requests to permission@vnews.com.

Dartmouth College professor of computer science Hany Farid plans a meal with his wife, Emily Cooper, at their home in Norwich, Vt., on Wednesday morning, February 15, 2017. Farid is the chair of the computer science department at Dartmouth College and Cooper is a professor of psychology focusing her work on human vision. (Valley News – James M. Patterson) Copyright Valley News. May not be reprinted or used online without permission. Send requests to permission@vnews.com.

Hany Farid, of Norwich, walks to his office on the Dartmouth College campus in Hanover, N.H., on Wednesday, February 15, 2017. Farid is the chair of the computer science department at Dartmouth College and a leader in digital forensics, using his work to combat child pornography and extremist propaganda. (Valley News – James M. Patterson) Copyright Valley News. May not be reprinted or used online without permission. Send requests to permission@vnews.com.

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