Rolling code: Difference between revisions

Revision as of 21:12, 5 June 2013

Revision as of 21:13, 5 June 2013

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A '''rolling code''' (or sometimes called a '''hopping code''') is used in [[keyless entry]] systems to prevent [[replay attacksattack]]s, where an [[Eavesdropping|eavesdropper]] records the transmission and replays it at a later time to cause the receiver to 'unlock'.

Such systems are typical in [[garage door opener]]s and keyless car entry systems. The most widely spread algorithm for code hopping systems today is [[KeeLoq]].{{Citation needed|date = December 2008}}