He has given the old key to Комитет Государственной Безопасности under "all your lusers belong to us" dragnet total surveilance order as they were not happy with accessing specific lusers via subpoena and wanted all of them. He gave it in 5 point font in print and is under contempt of court procedings for not giving an electronic copy. This part is now public knowledge (though he is probably under secret contempt of court procedings too on making it public knowledge).
The assumption should be that his "new" key is under similar orders, this time successful so that Комитет Государственной Безопасности can collect all the user info at dragnet level.