Make Secure Phone Calls With Signal for iOS

Everyone is concerned about security these days, especially when our smartphones and tablets are so vulnerable (due in large part to their multitasking abilities and portability). You can put a passcode on your device to make it more difficult for the bad guys to gain access and you can transfer documents securely using encrypted apps, but how do you protect phone calls? Open Whisper Systems has an answer with their new app, Signal.

Using Signal is simple, beginning with adding a phone number and then confirming it with a six-digit confirmation code (sent by SMS or phone call). When a phone call is initiated between two participating users, a pair of words is shown (one on each caller’s screen). From there, the security words are exchanged and a secure connection is in effect.

During an interview with Wired magazine, Open Whisper Systems founder Moxie Marlinspike noted:

“We’re trying to make private communications as available and accessible as any normal phone call,” says Moxie Marlinspike, the hacker security researcher who founded the nonprofit software group. Later this summer, he adds, encrypted text messaging will be integrated into Signal, too, to create what he describes as a “single, unified app for free, easy, open source, private voice and text messaging.”

Initial tests conducted by media and beta testers unveiled a few bugs, but overall Signal performed as advertised.

Secure phone calls may be overkill for most applications –but it is easy to consider situations where it may be advisable, such as: calls between doctors and their patients, or lawyers and their clients.

Ready to start making secure phone calls? Download Signal – Private Messenger from the Apple App Store for free. Existing users of the Android RedPhone app can also take advantage of this secure calling technology.