نص أصلي - انجليزي - Almost twenty years later, after getting her...

Almost twenty years later, after getting her master's in mathematics from Johns Hopkins
and studying number theory on a full scholarship from MIT, she submitted her doctoral
thesis, Cryptographic Methods, Protocols, and Algorithms for Manual Applications.
Apparently her professor was not the only one who read it; shortly afterward, Susan
received a phone call and a plane ticket from the NSA.