Encrypted communications firm Silent Circle provides a range of products for its subscribers, including privacy-focused text-messaging services and even offers its very own smartphone. Now, the Switzerland-based company is ramping up its service in the voice-calls space, as it reveals that it’s Out-Circle Calling (OCC) encrypted VoIP offering is being expanded globally, and is available to make calls to more than 79 markets. It’s similar to what you can already do with Skype’s mobile apps, letting you call other non-Silent Circle subscribers on their mobile or landline phones. Beyond North America While it was only available in the US, Canada...

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