News reports that Silent Circle, the commercial encrypted voice-over-IP service company that manufactures the security-focused Blackphone, had removed its “warrant canary” webpage have apparently created some confusion. Things only got fuzzier since the company counsel stated that the page’s removal was a “business decision” and not the result of a warrant being served against the company for customer data. But the explanation for that decision, made more than a year ago with no fanfare, is actually very simple: Silent Circle’s customers don’t care. In fact, the warrant warning might have been a liability with some of Silent Circle’s core customers, who might be more likely to be serving a warrant than receiving one.
Many of Silent Circle’s customers are in the government and corporate sector. “Our customer base is generally not concerned with law enforcement,” Vic Hyder, Silent Circle’s chief strategy officer, explained to Ars. “They use Silent Circle to protect their business activities from criminals and competition for the most part.”
As Ars reported when we tested the original Blackphone and the Blackphone 2, the Silent Phone service definitely keeps customer security at the core. It provides end-to-end encrypted voice, video, and text messaging, and the service doesn’t provide any way for the Switzerland-based company to monitor or log the contents of messages, much as Apple’s iMessage service can’t. In addition to a layer of SSL encryption between the two ends of a call or message stream, Silent Phone applies another layer of encryption based on an exchange of keys. As a result, once the call or message thread is established, all of the data is protected between devices. In cases of calls from Silent Phone to an unsecured phone, the call is encrypted all the way to Silent Circle’s access point to the switched public phone network.
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