This comes as newly revealed documents show how the Justice Department subpoenaed Open Whisper Systems, the maker of the popular encrypted messaging application Signal, in efforts to get a wide range of information about two phone numbers—and then imposed a gag order on Open Whisper Systems preventing the company from talking about it. The encrypted application maker did not turn over the desired information because the company does not store such information about its users. The Justice Department sought the information in early 2016, but it’s only coming to light now because the gag order has been lifted.