Offering a refined take on the category, this system features a powerful 5.1-channel receiver with AirPlay and a front panel USB port for direct connectivity to iPhones, iPads, iPods and USB drives.

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However, if there is a lot of noise (interference) on the channel the receiver is listening to, it cannot detect the intended signal because it is covered by noise.

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Leading off Denon's new receiver line is the 7.1-channel AVR-4310CI, engineered with a full complement of leading-edge features and capabilities.

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The MIT mathematicians, that is, sidestepped a weak spot that had plagued cryptographers ever since the days of the ancient Greeks: How do sender and receiver hand off a key without risking that their communication channel or their courier will be compromised in some way?

FORBES: I've got a secret