Hi! I'm on the mobile development team here at goTenna. We're taking advantage of the Bluetooth LE standard encyption with is AES-CCM. More on that here: http://bit.ly/1teKWvG

For encrypting the data as it's sent between gotennas we're using 1024 bit RSA. Not sure what level of detail you'd like.. but here are a few things to get you started!

RSA itself: http://bit.ly/1kDlTgP Cryptographic Services: http://bit.ly/1teLhPb More on CDSA (see above articles first): http://bit.ly/Ug2CLt

Much of our approach is fairly standard!