[chvid]

It is Germany's largest newspaper.

The data probably would have been handed over in person.

My guess is he is German speaking; maybe from Switzerland or Liechtenstein.

But I wonder about doing something like this: He is not exactly protected, what he has done is illegal (at least to some extent - whistleblower laws etc.), he stands to make no personal gains.

One thing is being a high profile whistleblower like Snowden or Assange. But this guy? Where does he end up?