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'.
Such systems are typical in garage door openers and keyless car entry systems. The most widely spread algorithm for code hopping systems today is KeeLoq.
Read more about Rolling Code: Techniques, Application in RF Remote Control, Rolling Code Vs. Fixed Code RF Remote Control, See Also
Famous quotes containing the words rolling and/or code:
“... in the cities there are thousands of rolling stones like me. We are all alike; we have no ties, we know nobody, we own nothing. When one of us dies, they scarcely know where to bury him.... We have no house, no place, no people of our own. We live in the streets, in the parks, in the theatres. We sit in restaurants and concert halls and look about at the hundreds of our own kind and shudder.”
—Willa Cather (1873–1947)
“... the self respect of individuals ought to make them demand of their leaders conformity with an agreed-upon code of ethics and moral conduct.”
—Mary Barnett Gilson (1877–?)