rollingcode
nounUK /ˈrəʊlɪŋ kəʊd/
US /ˈroʊlɪŋ koʊd/
A rolling code is a secret number that changes every time you use a remote, so nobody can copy it.
The garage door uses a rolling code, so a thief cannot record the signal and open it later.
RELATED WORDS
OTHER MEANINGS
2. A code that shifts position or value in a repeating pattern over time.
The engineer studied the rolling code to predict the next value in the sequence.
3. A method where each new code is generated from the previous one to keep it secret.
The car key and the car share a rolling code so they stay in sync.
4. A security feature in wireless devices that prevents replay attacks.
Because of its rolling code, the wireless lock cannot be fooled by an old recording.