Chancellor Angela Merkel was frustrated on Wednesday that Russia had targeted her for hacking, and said she had concrete evidence of the "outrageous" attempts at espionage.
"I can honestly say that it hurts me. Every day I try to build a better relationship with Russia, and on the other hand there is so hard evidence that the Russian armed forces are doing this," she told Parliament.
The German secret service has repeatedly called for attempts by Russian hackers to spy on legislators or leading politicians.
German media reported that the information copied by hackers in 2015 included data from Merkel's email account. This attack also targeted the Bundestag.
Merkel said hacking 2015 investigators identified a specific suspect.
"Unfortunately, I have come to the conclusion that this is not new," she said, noting that "cyber disorientation, falsification of facts" were part of the "Russian strategy".
"Obviously, it doesn't make it easier" to maintain a better relationship with Moscow, she said, calling such spy tactics "more than uncomfortable".