abstract:A rolling code (or sometimes called a hopping code) is used in keyless entry systems to prevent replay attacks, where an eavesdropper records the transmission and replays it at a later time to cause the receiver to 'unlock'.
To make it quick and easy to get rolling with Everio, Wi-Fi models are supported by a QR code-based Wi-Fi setup utility, and all models are supported by a mobile user guide that's been optimized for smartphone viewing.
But the 92121 zip code--located some 25 kilometers north of downtown, east of the rolling mesas of La Jolla--boasts 89 biotech companies, the most densely packed cluster in the U.S., says Juan Enriquez, director of the Life Science Project at Harvard Business School.