| 摘要 |
PURPOSE: A key-less entry method is provided to improve the security of a key-less entry device by deciding the authenticity of a key-less entry code through a rolling code generated randomly and non-sequentially every time a key is manipulated. CONSTITUTION: In a key-less entry method of a vehicle, the number of key manipulation by a user's function is counted in a transmitter(S20). A count code corresponding to the number of the key manipulation is generated(S30). A random rolling code is generated by applying the generated count code to a specific random code generation algorism(S40). A key-less entry code corresponding to a predetermined ID code, the count code, the rolling code and a function key are generated and sent(S50). The key-less entry code sent from the transmitter is received through a receiver(S60). The ID code among the received key-less entry codes is compared with the predetermined ID code(S70). When the ID code is equalized, a rolling code is generated by applying the received count code to the random code generation algorism equal to that of the receiver(S90). The generated rolling code is compared with the received rolling code(S100). Then in case that the rolling code is equalized, a function is performed according to the received function code(S120).
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