Patent ID: 11876810
Assignee: DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC G  H

Claim 6:
7. A node apparatus for detecting a malicious node in a bus network system, comprising:
an interface device configured to receive a target signal from any one of other nodes in a bus network system;
a storage device configured to pre-store reference autocorrelation characteristics and node identifiers for each signal received from the other nodes; and
a processor configured to search for an autocorrelation characteristic, which is identical to an autocorrelation characteristic of the target signal or similar to the autocorrelation characteristic of the target signal by a reference level or more, among reference autocorrelation characteristics stored in the storage device, wherein the processor divides the target signal into a plurality of samples in units of a predetermined time interval or a frame length, and calculates the autocorrelation characteristic of the target signal by calculating a correlation between any one and each of the remaining samples of the plurality of samples, and determine any one node as the malicious node when a first node identifier matching the searched autocorrelation characteristic and a second node identifier extracted from a packet transmitted to the target signal are the same.