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US 11,637,846 B2Granted
Method and device for securing network
AssigneeDaegu Gyeongbuk Institute of Science and Technology
InventorsJi Woong Choi, Eun Min Choi, Sung Min Han
Life of this patent
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Abstract
A method, performed by an observer node, of securing a network, includes: receiving a signal over the network; determining, based on a frequency characteristic of the received signal, which is determined according to a physical characteristic of a node, which transmits the received signal, a node, which has transmitted the received signal among a plurality of nodes included in the network; comparing a pre-learned signal pattern of the determined transmission node with a pattern of the received signal to determine whether the determined transmission node is a malicious node; and blocking the signal transmitted from the malicious node by determining that the transmission node is a malicious node.
Claims8
A method, performed by an observer node, of securing a network, the method comprising:
- receiving a signal over the network;
- determining a transmission node, which has transmitted the received signal among a plurality of nodes included in the network, by comparing a frequency characteristic of the received signal with a predetermined frequency characteristic of each node of the plurality of nodes, wherein the predetermined frequency characteristic is pre-determined based on a physical characteristic between the observer node and the each node over the network;
- determining whether the determined transmission node is a malicious node by comparing a signal pattern of the received signal with a pre-learned signal pattern of the determined transmission node, wherein the pre-learned signal pattern includes identification information of a signal transmitted from a predetermined node among the plurality of nodes;
- and
- when the determined transmission node is determined as the malicious node, blocking the signal transmitted from the malicious node,
- wherein the predetermined frequency characteristic of each node is the magnitude of each signal transmitted from the each node to the observer node,
- wherein a difference between each of the pre-learned frequency characteristics respectively corresponding to the plurality of nodes and the frequency characteristic of the received signal, a frequency-specific signal magnitude difference, is calculated, and a node corresponding to a frequency characteristic of which the calculated difference is within a predetermined range is determined as the transmission node, and
- wherein when a plurality of nodes have a frequency characteristic of which the calculated difference is within a predetermined range, the observer node update or add a reference frequency or a reference frequency band for distinguishing the plurality of nodes.
5 more elements
A security device for securing a network, the security device comprising:
- a communication unit configured to receive a signal over the network;
- and
- a processor,
- wherein the processor is configured to
- determine a transmission node, which has transmitted the received signal among a plurality of nodes included in the network, by comparing a frequency characteristic of the received signal with a predetermined frequency characteristic of each node of the plurality of nodes, wherein the predetermined frequency characteristic is pre-determined based on a physical characteristic between the observer node and the each node over the network;
- determine whether the determined transmission node is a malicious node by comparing a signal pattern of the received signal with a pre-learned signal pattern of the determined transmission node, wherein the pre-learned signal pattern includes identification information of a signal transmitted from a predetermined node among the plurality of nodes;
- and
- when the determined transmission node is determined as the malicious node, block the signal transmitted from the malicious node,
- wherein the predetermined frequency characteristic of each node is the magnitude of each signal transmitted from the each node to the observer node,
- wherein the security device is one of the plurality of nodes included in the network,
- wherein a difference between each of the pre-learned frequency characteristics respectively corresponding to the plurality of nodes and the frequency characteristic of the received signal, a frequency-specific signal magnitude difference, is calculated, and a node corresponding to a frequency characteristic of which the calculated difference is within a predetermined range is determined as the transmission node, and
- wherein when a plurality of nodes have a frequency characteristic of which the calculated difference is within a predetermined range, the observer node update or add a reference frequency or a reference frequency band for distinguishing the plurality of nodes.
9 more elements
A method, performed by an observer node, of securing a network, the method comprising:
- receiving a signal over the network;
- determining a transmission node, which has transmitted the received signal among a plurality of nodes included in the network, by comparing a signal pattern of the received signal with a pre-learned signal pattern of the determined transmission node, wherein the pre-learned signal pattern includes identification information of a signal transmitted from a predetermined node among the plurality of nodes;
- determining whether the determined transmission node is a malicious node by comparing a frequency characteristic of the received signal with a predetermined frequency characteristic of each node of the plurality of nodes, wherein the predetermined frequency characteristic is pre-determined based on a physical characteristic between the observer node and the each node over the network;
- when the determined transmission node is determined as the malicious node, blocking the signal transmitted from the malicious node,
- wherein the predetermined frequency characteristic of each node is the magnitude of each signal transmitted from the each node to the observer node,
- wherein a difference between each of the pre-learned frequency characteristics respectively corresponding to the plurality of nodes and the frequency characteristic of the received signal, a frequency-specific signal magnitude difference, is calculated, and a node corresponding to a frequency characteristic of which the calculated difference is within a predetermined range is determined as the transmission node, and
- wherein when a plurality of nodes have a frequency characteristic of which the calculated difference is within a predetermined range, the observer node update or add a reference frequency or a reference frequency band for distinguishing the plurality of nodes.
4 more elements
Dependencies are inferred from the claim text.