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The only Signal user data we have, and the only data the US government obtained, as a result, was the date of account creation and the date of last use – not user messages, groups, contacts, profile information, or anything else,” responded Matthew Rosenfeld, Signal creator. “There wasn’t (and still isn’t) really anything to obtain. In this regard, in 2016, Telegram reveals that nothing was available to provide for the US government’s request to access Signal user data through a grand jury subpoena from the Eastern District of Virginia. Not only are calls and messages encrypted but also metadata such as who you spoke to and detailed time logs of when those conversations occurred. This works by encoding the message of a sender in such a way that the intended device of the recipient can unlock it only without being exposed to any third party, not even the company itself. By default, Signal uses its own end-to-end encryption protocol that other companies including WhatsApp and Skype use.

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