FBI demands Signal user data, but there’s not much to hand over

Enlarge / Moxie Marlinspike is the founder of Open Whisper Systems. (credit: Knight Foundation)

The American Civil Liberties Union announced Tuesday that Open Whisper Systems (OWS), the company behind popular encrypted messaging app Signal, was subpoenaed earlier this year by a federal grand jury in the Eastern District of Virginia to hand over a slew of information—"subscriber name, addresses, telephone numbers, email addresses, method of payment"—on two of its users.

Further, OWS was prevented for at least several months from publicly disclosing that it had received such an order until the ACLU successfully challenged it.

While details of the case remain sealed, the ACLU published a number of partially redacted court documents, including its initial response to the FBI.

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