Ikenna Iffih, 20, who studied at Northeastern University, could have faced up to 20 years in prison but under a plea deal will serve no more than six months. Sentencing was set for October. Iffih, who was born in Nigeria, could also be deported.

Iffih broke into computers belonging to the Defense Logistics Agency, which supplies and services the military, and accessed servers at the Interior Department and at NASA's Goddard Space Flight Center in Greenbelt, Md.