This is reassuring to those of us who use Signal to protect sources, etc. Joseph Menn reports:
Open Whisper Systems, the developer of encrypted messaging app Signal, received a subpoena earlier this year requesting user information but was only able to supply the duration of a user’s membership, according to court documents unsealed last week. An assistant attorney in the U.S. state of Virginia requested email addresses, history logs, browser cookie data and other information associated with two phone numbers as part of a grand jury probe, the redacted documents showed.
The request was made in the first half of this year, the documents showed.
Read more on Reuters.