"Jonathan Mayer, a computer scientist at Stanford University, said historical records provided some evidence that the server could have been located in the Clinton home near Chappaqua, New York. Later, either the server was physically moved or the data was rerouted.
Mayer said it was impossible to tell from tests on the historical server whether it was well secured against hacker attack – a critical question given the sensitivity of Clinton’s role and the aggressiveness of the cyber threat from countries such as China.
“It’s possible the server was well secured,” he said. “I’m not in a position to say, short of having access to the server itself.”"