KR102159070B1 - Method for Determining type of IoT Device and IoT Care Device - Google Patents

Abstract

According to an embodiment of the present invention, disclosed is a method for determining the type of Internet of things (IoT) device, which comprises: a port scanning step (S100) of finding an open port of the IoT device included in an IoT network; a protocol scanning step (S200) of finding a protocol used in the open port found as a result of performing the port scanning step (S100); and a type estimation step (S300) of estimating the type of the IoT device based on the results of the scanning steps (S100, S200). According to one or more embodiments of the present invention, it is possible to estimate the type of IoT device included in an IoT network.

Description

Method for determining the type of IoT device and IoT care device {Method for Determining type of IoT Device and IoT Care Device}

The present invention relates to a method of determining the type of an IoT device and an IoT care device.

The Internet of Things (IoT) (hereinafter referred to as'IoT') refers to a technology that connects various things through wireless communication. On the other hand, IoT has a risk of being hacked by a Linux worm if the Linux operating system, which is the basis of many IoT devices, is not properly secured or updated properly in the device (Dick O'Brien, 20 January 2014, “The Internet of Things: New Threats Emerge in a Connected World”, Symantec) In fact, there is a case of invading privacy by exploiting security vulnerabilities in IoT environments. TRENDnet, a company that manufactures and sells SecurView, a baby monitoring camera in the US Distributed it without establishing the right security system for its products, which resulted in leaking videos of 700 households inside homes to hackers, and TRENDnet was subject to sanctions by the Federal Trade Commission.

On the other hand, in order to strengthen the security of IoT, technologies for analyzing the vulnerability of devices that make up the IoT (hereinafter referred to as'IoT devices') have been disclosed. Vulnerability analysis technology is to complement the vulnerability by analyzing the vulnerability of the IoT device in advance.

However, since the devices that make up the IoT come in various types (TV, refrigerator, speaker, washing machine, light, etc.), it is necessary to separately prepare data for vulnerability analysis suitable for the type of IoT device to analyze the vulnerability of each IoT device. do. Therefore, in order to analyze the vulnerability of the IoT device without knowing the type (i.e., type) of the IoT device, all types of vulnerability analysis data must be sequentially used, which requires a lot of computing resources and time required for vulnerability analysis. .

According to an embodiment of the present invention, a method of determining the type of an IoT device may be provided.

According to an embodiment of the present invention, an IoT care device capable of determining a type of an IoT device may be provided.

According to an embodiment of the present invention, an IoT care device capable of analyzing a vulnerability according to the type of IoT device may be provided.

According to an embodiment of the present invention, a port scanning step of finding an open port of an IoT device included in an IoT network (Port Scanning step); A protocol scanning step of finding a protocol used in an open port found as a result of performing the port scanning step; And a Type Assumption step of estimating the type of the IoT device based on the results of the scanning steps. The method of determining the type of the IoT device may be provided.

According to another embodiment of the present invention, a port scanning unit that performs a port scanning operation to find an open port of an IoT device included in an IoT network; A protocol scanning unit that searches for a protocol used in an open port found by the port scanning operation; And a type estimating unit that estimates the type of the IoT device based on the result of the scanning steps. The IoT care device may be provided to determine the type of the IoT device.

According to one or more embodiments of the present invention, it is possible to estimate the type (ie, type) of IoT devices included in the IoT network. Accordingly, when analyzing the vulnerability of the IoT device, the data for vulnerability analysis suitable for the type of the IoT device is directly used, so that computing resources and time required for vulnerability analysis are saved.

1 is a diagram illustrating a system for determining a type of an IoT device according to an embodiment of the present invention.
FIG. 2 is a diagram for describing a device for determining the type of an IoT device used in the system for determining the type of the IoT device of FIG. 1.
3 is a diagram illustrating a method of determining a type of an IoT device according to an embodiment of the present invention.

The above objects, other objects, features, and advantages of the present invention will be easily understood through the following preferred embodiments related to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. The embodiments described below are exemplary embodiments provided to sufficiently convey the spirit of the present invention to those skilled in the art.

Definition of Terms

In this specification, the term'software' refers to a technology that moves hardware in a computer, and the term'hardware' refers to a type of device or device (CPU, memory, input device, output device, peripheral device, etc.) constituting a computer. And, the term'step' means a series of processes or manipulations connected in a time series to achieve a predetermined order, the term'program means a set of instructions for processing by a computer, and the term'program recording medium' means It refers to a recording medium that can be read by a computer that records programs used to install, execute, or distribute programs.

In the present specification, when an element is referred to as being “above” (or “below”, “right”, or “left”) of another element, it is above (or below, right, or left) of another element. ), or a third component may be interposed between them. In addition, the length or thickness of the components in the drawings is exaggerated for effective description of the technical content.

In the present specification, when terms such as first and second are used to describe components, these components should not be limited by these terms. These terms are only used to distinguish one component from another component. The embodiments described and illustrated herein also include complementary embodiments thereof.

In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, "comprise" and/or "comprising" does not exclude the presence or addition of one or more other components.

In the present specification, the term'management' is used as a meaning including'receiving','sending','storing','modifying', and'deleting' of data.

In the present specification,'element A and/or element B'means'element A','element B', or'element A and element B'.

In the present specification, the'user terminal device' is a computer, and may be a device such as a desktop computer, a notebook computer, a smart phone, or a PDA.

In the present specification, the'computer' includes a computer processor and a storage device, an operating system, firmware, an application program, a communication unit, and other resources, wherein the operating system (OS) is other hardware, firmware, or an application program (eg For example, a management program) can be operatively linked. The communication unit refers to a module composed of software and hardware for transmitting and receiving data with the outside. Further, the computer processor and the storage device, operating system, application programs, firmware, communication unit, and other resources are operatively connected to each other. On the other hand, the description or drawings for the above-mentioned components are described or illustrated in the limit for the purpose of description of the present invention.

In the present specification, the element'A' to transmit information, details, and/or data to the element'B' means that the element'A' is directly transmitted to the element'B' or the element'A' Is used to include transmitting to the component'B' through at least one other component.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings.

1 is a diagram illustrating a system for determining the type of an IoT device according to an embodiment of the present invention, and FIG. 2 is a diagram for determining the type of an IoT device used in the system for determining the type of the IoT device of FIG. It is a diagram for explaining a device.

Referring to these drawings, a system for determining the type of an IoT device according to an embodiment of the present invention includes an IoT Care Device.

The IoT network includes a plurality of IoT devices (5: 5a, 5b, 5c, 5d), an access point (hereinafter referred to as'AP) 3 and an IoT care device 100.

The AP 3 is a device that allows wireless devices or wired devices to be connected to each other using a standard protocol in a computer network. Here, the standard protocol may be for wired communication defined by IEEE 802.3, or for wireless communication defined by IEEE 802.11. These standard protocols are exemplary, and the present invention is not limited to such standard protocols.

The plurality of IoT devices 5: 5a, 5b, 5c, and 5d communicate via wired and/or wirelessly through the AP 3. In this embodiment, the IoT care device 100 may communicate with a plurality of IoT devices 5: 5a, 5b, 5c, and 5d through the AP 3.

In the present embodiment, the number of the plurality of IoT devices 5: 5a, 5b, 5c, and 5d is shown as five, but such a number may be less or more than this as an example.

As shown in Fig. 1, data transmitted from the network N is sequentially passed through the gateway 1 and the AP 3, and then a plurality of IoT devices 5: 5a, 5b, 5c, 5d or IoT It arrives at the care device 100. In addition, when a plurality of IoT devices (5: 5a, 5b, 5c, 5d) or the IoT care device 100 wants to transmit data to the network (N), such data is transmitted to the AP (3) and the gateway (1). It is transmitted to the network (N) after passing through. That is, a plurality of IoT devices (5: 5a, 5b, 5c, 5d) and IoT care device 100 are located at the lower level of the AP 3, and the gateway 1 is located at the upper level of the AP 3 In addition, a plurality of IoT devices 5: 5a, 5b, 5c, and 5d and the IoT care device 100 are located at the same level.

In this embodiment, the network N may be a communication network connected to transmit and receive mutual data through a wide area communication network (WAN), an urban area communication network (MAN), a local area network (LAN), and/or a personal communication network (PAN).

In this embodiment, the IoT care device 100 may perform a port scanning operation, a protocol scanning operation, and a type estimation operation.

The port scanning operation is to find open ports of IoT devices 5 included in the IoT network. That is, the port scanning operation is an operation to check which ports are open for each of the IoT devices 5.

The port scanning operation may be performed by techniques called, for example, FULL SCNNING or STEALTH SCANNING. Full scanning is a technology that establishes a perfect TCP session and checks open ports. Stealth scanning is a kind of half scan technology, and when a packet for port verification is sent and a response to such a packet for port verification is received, the responding port is open, and if there is no response, the port is closed. I judge it. Stealth scanning can be, for example, FIN, NULL, or XMASH.

A port is a logical unit that identifies a network service or a specific process, and a protocol using a port is, for example, a transport layer protocol. Examples of the transport layer protocol may be transmission control protocol (TCP) and user datagram protocol (UDT). Ports are identified by number, and these numbers are called port numbers. For example, port numbers are used with IP addresses.

Port numbers can be classified into three types, for example.

Port number Port type 0 ~ 1023 Well-known port 1024 ~ 49151 Registered port 49152 ~ 65535 Dynamic port

Meanwhile, representative examples of well-known ports are as follows.

-No. 20: FTP(data)

-No. 21: FTP (control)

-No. 22: SSH

-No. 23: Telnet

-No. 53: DNS

-80: World Wide Web HTTP

-119: NNTP

-443: TLS/SSL HTTP

These port numbers and port types are exemplary, and those who are engaged in the technical field to which the present invention pertains (hereinafter, referred to as'the person skilled in the art') will readily know.

For the purpose of explanation of the present invention, the open port of the IoT device 5a is port 80, the off port of the IoT device 5b is port 23, and the open port of the IoT device 5c is port 5555. , It is assumed that the open port of the IoT device 5d is port 5559.

The port scanning operation is an operation to find open ports of IoT devices 5 included in the IoT network. For example, through the port scanning operation of the IoT care device 100, the open port of the IoT device 5a is port 80, the off port of the IoT device 5b is port 23, and the IoT device 5c It finds out that the open port of is port 5555, and the open port of IoT device (5d) is port 5559.

The protocol scanning operation is an operation to know the type of protocol used in an open port. Here, the open port is determined by the port scanning operation. For example, the IoT care device 100 searches for a protocol used in port 80, which is an open port of the IoT device 5a. In addition, the IoT care device 100 uses a protocol used in port 23 of the IoT device 5b, a protocol used in port 5555 of the IoT device 5c, and port 5559 of the IoT device 5d. Each one finds what protocol is used.

The protocol scanning operation performed by the IoT care device 100 includes an operation of checking the type of an open port, an operation of creating a packet to be sent to the open port (hereinafter,'protocol confirmation packet') according to the type of open port, An operation of transmitting a protocol confirmation packet to the IoT device having the open port, and an operation of confirming whether a response is received from the IoT device that has transmitted the protocol confirmation packet.

The protocol confirmation packet may be, for example, a script.

The operation of confirming the type of open port is an operation of confirming what type of open port is found by the port scanning operation. For example, the operation of checking the type of open port is an operation of checking whether the open port corresponds to one of a well-known port, a registered port, or a dynamic port. to be. In order to perform an operation to check the type of open port, data (for example, <Table 1>) (hereinafter,'port type data'), in which the type of port is classified according to the port number, must be prepared in advance. Such'port type data' may be stored and managed by the IoT care device 100.

According to an embodiment, the IoT care device 100 may know the type of the open port by referring to'port type data'. For example, in the IoT care device 100, port 80 of the IoT device 5a and port 23 of the IoT device 5b are well-known ports, and 5555 of the IoT device 5c It can be seen that the port and port 5559 of the IoT device 5d are dynamic ports.

The IoT care device 100 performs an operation of creating a protocol confirmation packet suitable for the type of open port. For example, since port 80 of the IoT device 5a is a well-known port that uses the World Wide Web HTTP protocol, the IoT device ( 5a). When there is a response from the IoT device 5a to the protocol confirmation packet created using the web HTTP protocol, the IoT care device 100 determines that port 80 of the IoT device 5a uses the web HTTP protocol. On the other hand, if there is no response from the IoT device 5a to the protocol confirmation packet created using the web HTTP protocol, the IoT care device 100 determines that the port 80 of the IoT device 5a does not use the web HTTP protocol. do. In this case, the IoT care device 100 creates a protocol confirmation packet using a protocol other than the World Wide Web HTTP protocol and transmits it to the IoT device 5a. When there is a response from the IoT device 5a to a protocol confirmation packet written in a protocol other than the web HTTP protocol, the IoT care device 100 determines that port 80 of the IoT device 5a uses the other protocol. . If there is no response from the IoT device 5a to the protocol confirmation packet written in the protocol other than the web HTTP protocol, the IoT care device 100 uses the other protocol by port 80 of the IoT device 5a. You decide not to do it. Thereafter, the IoT care device 100 creates and transmits a protocol confirmation packet using another protocol until a response comes from the IoT device 5a. The IoT care device 100 finds out the type of protocol actually used in the open ports of the IoT devices 5 by the above-described method.

The IoT care device 100 uses at least one result of a result of performing the above-described photo scanning operation and a result of performing a protocol scanning operation, to determine each type of the IoT devices 5. Performs an estimated type estimation operation (Type Assumption).

According to an embodiment, the type estimation operation performed by the IoT care device 100 includes an operation of estimating the type of service from the type of the protocol found as a result of performing the protocol scan operation, and the estimated type of service. It includes an operation of estimating the type of IoT device from the type of service.

The operation of estimating the type of service from the type of protocol is based on experience that a protocol mainly used for each service is usually determined. For example, the RTSP, RTP, or RTCP protocol mainly supports streaming services. That is, when data defining mainly supported services for each protocol (hereinafter,'protocol-service mapping data' is prepared, the IoT care device 100 uses'protocol-service mapping data') from the type of protocol. The type of service can be estimated The'protocol-service mapping data' can be stored and managed by the IoT care device 100.

The operation of estimating the type of IoT device from the type of service is also based on the experience that a service mainly used for each type of IoT device is usually determined. For example, the RTSP, RTP, or RTCP protocol mainly supports streaming services, and such streaming services are provided by IoT devices such as IP TV, for example. That is, when data defining the types of IoT devices mainly provided for each service (hereinafter,'service-type mapping data' is prepared, the IoT care device 100 uses the'service-type mapping data' The type of the IoT device can be estimated from the type of'service-type mapping data' can be stored and managed by the IoT care device 100.

Meanwhile, the response to the protocol confirmation packet may include at least one of banner information and service information of the IoT device.

The banner information included in the response to the protocol confirmation packet typically includes data indicating what kind of operating system is used in the IoT device. If the type of operating system is known, the IoT care device 100 may know the type of service or estimate the type of the IoT device.

Examples of operating systems used in IoT devices are Tizen, Brillo, Fuchsia, or LiteOS. Here, Tizen is an open source mobile operating system that supports portable devices such as mobile phones, and IoT devices such as TVs and refrigerators, and Brillo is an Android-based embedded operating system released by Google, and Fook. Fuchsia is an operating system that is being developed by Google and is an operating system to support embedded systems, PCs, smartphones, and IoT devices, and LiteOS is developed by Huawei for IoT devices and is a smart home, wearable device, or It is an operating system to support various IoT devices such as smart cars.

The service information included in the response to the protocol confirmation packet typically includes data indicating what type of IoT device is. For example, service information may include data such as'My iPhone', and this data is information that directly indicates the type of IoT device.

According to an embodiment, the type assertion performed by the IoT care device 100 includes at least one of banner information and service information of the IoT device, and the above-described photo scanning. At least one of the execution result of the operation and the execution result of the protocol scanning operation is used.

For example, a type estimation operation performed by the IoT care device 100 includes a first estimation operation, a second estimation operation, a comparison operation, and a type determination operation.

The first estimation operation is an operation of estimating the type of service from the type of the protocol obtained by the protocol scanning operation. For an exemplary description of the first estimation operation, refer to the description section referring to the RTSP, RTP, or RTCP protocol.

The second estimating operation is an operation of estimating the type of service using at least one of banner information and service information of the IoT device. Exemplary explanations for the second presumptive action include a description that mentions Tizen, Brillo, Fuchsia, or LiteOS, and a description that mentions My iPhone. Please refer to the section.

The comparison operation is an operation of comparing the type of service estimated by the first estimation operation and the type of service estimated by the second estimation operation.

In the type determination operation, when the type of service estimated by the first estimation operation and the type of service estimated by the second estimation operation are different from each other, the type of the IoT device is determined from the service type estimated by the second estimation operation. If the type of service estimated by the first estimation operation and the type of service estimated by the second estimation operation are the same, the IoT device from the type of service estimated by the first estimation operation or the second estimation operation This is the action that determines the type of.

On the other hand, when there is no banner information and service information of the IoT device, or there is no data for estimating the type of service in the banner information and service information, the type estimation operation is performed as follows: Includes estimation operation and type determination operation. That is, the type estimation operation can be performed only with the first estimation operation and the type determination operation without performing the second estimation operation and the comparison operation.

As another example, the IoT care device 100 may perform a port scanning operation, a protocol scanning operation, a type estimation operation, and a reliability calculation operation. Here, since the port scanning operation, the protocol scanning operation, and the type estimation operation have been described above, a reliability calculation operation will be described.

The reliability calculation operation is an operation of calculating the accuracy of the type of the IoT device estimated by the type estimation operation as a numerical value.

For example, when the type of service estimated by the first estimation operation and the type of service estimated by the second estimation operation are the same as each other, the type of IoT device determined from the type of the service is the reliability level. It can be calculated from 90% or more to 100%.

In addition, for example, when the type of service estimated by the first estimation operation and the type of service estimated by the second estimation operation are different from each other, for example, the type of service estimated by the second estimation operation. The type of IoT device determined from may be calculated with a reliability of 80% or more and less than 90%.

In addition, for example of the reliability calculation operation, when the type estimation operation is performed with the first estimation operation and the type determination operation without performing the second estimation operation and the comparison operation, the IoT device estimated by the type estimation operation Reliability can be calculated from 70% to less than 80%.

The numerical values of the above-described reliability calculation operation are exemplary, and the present invention is not limited to those numerical values, and those skilled in the art are those skilled in the art, as a result of performing a port scanning operation, a result of performing a protocol scanning operation, Service) The present invention may be configured to calculate the reliability of other numerical values by reflecting the degree of use of information.

Referring to FIG. 2, the IoT care device 100 includes a port scanning unit 101, a protocol scanning unit 103, an IoT device type estimating unit 104, an IoT vulnerability analysis unit 105, and an operating system 107. ), a communication unit 109, a computer processor 111, a memory device 113, and a memory 115. Here, the operating system 107 is a software that provides a hardware abstraction platform and a common system service in order to manage hardware as well as execute application software, and the memory device 113 and the memory 115 store and execute programs, respectively. It is a device that provides space for The computer processor 111 is a central processing unit (CPU), and this central processing unit is a control unit of a computer that controls a computer system and executes a program operation, or a chip having its function.

The memory 115 and/or the memory device 113 provides a space in which programs are stored or executed, and is required for the operation of the present invention, such as protocol-service mapping data or service-type mapping data. Data can be saved.

The memory 115 and/or the memory device 113 also stores'data for vulnerability analysis' of the IoT devices 5. Preferably, the memory 115 and/or the memory device 113 stores'vulnerabilities analysis data' classified according to the types of IoT devices.

The port scanning unit 101 performs the above-described port scanning operation. The port scanning unit 101 creates a port confirmation packet, transmits the port confirmation packet to the IoT device through the communication unit 109, checks whether a response to the port confirmation packet is received, and opens the port on the IoT device. Decide.

The protocol scanning unit 103 performs the above-described protocol scanning operation. The protocol scanning unit 103 creates a protocol confirmation packet, transmits the protocol confirmation packet to the IoT device through the communication unit 109, checks whether a response to the protocol confirmation packet is received, and uses the open port. Determine the protocol actually used.

The IoT device type estimation unit 104 performs the above-described type estimation operation.

According to an embodiment, the type estimating unit 104 includes at least one of banner information and service information of the IoT device, an operation result of the photo scanning unit 101 and a protocol scanning unit 103 At least one of the operation results of is used.

According to another embodiment, at least one of the operation result of the photo scanning unit 101 and the operation result of the protocol scanning unit 103 is used. A detailed description of these embodiments has been described above, and thus will be omitted.

The IoT vulnerability analysis unit 105 analyzes the vulnerability of the IoT device by using the vulnerability analysis data stored in the memory 115 and/or the memory device 113. When the type estimation unit 104 estimates the type of the IoT device, the IoT vulnerability analysis unit 105 selects data for vulnerability analysis suitable for the type of the IoT device, and uses the selected vulnerability analysis data to determine the vulnerability of the IoT device. Analyze.

The IoT care device 100 may further include a reliability calculation unit (not shown) that performs a reliability calculation operation. The reliability calculation unit (not shown) performs the above-described reliability calculation operation.

All or at least part of the port scanning unit 101 may be configured as a program. A portion composed of a program is loaded into the memory 115 and performs a port scanning operation under the control of the computer processor 111. Other components, for example, the protocol scanning unit 103, the IoT device type estimating unit 104, the IoT vulnerability analysis unit 105, and the reliability calculation unit (not shown) are also used with the port scanning unit 101. It is configured in the same way and can perform its own actions. Meanwhile, detailed descriptions of the port scanning operation, the protocol scanning operation, the type estimation operation, and the reliability calculation operation have been described above, and thus will be omitted herein.

3 is a diagram illustrating a method of determining a type of an IoT device according to an embodiment of the present invention.

Referring to FIG. 3, a method of determining the type of an IoT device according to an embodiment of the present invention includes a port scanning step (S100) of finding an open port of an IoT device included in an IoT network. , Protocol Scanning step (S200) to find a protocol used in an open port found as a result of performing the Port Scanning step (S100), the above-described scanning steps (S100, S200) Based on the result of ), a type estimation step (S300) of estimating the type of the IoT device may be included.

Hereinafter, it is assumed that a method of determining the type of an IoT device according to an embodiment of the present invention is applied to a system for determining the type of an IoT device according to an embodiment of the present invention described with reference to FIGS. 1 and 2. , A method of determining the type of an IoT device according to an embodiment of the present invention will be described.

The port scanning step (S100) is to find an open port of IoT devices 5 included in the IoT network. That is, the port scanning step S100 is a step of performing the port scanning operation described with reference to FIGS. 1 and 2.

Also in this embodiment, for the purpose of explanation of the present invention, the open port of the IoT device 5a is port 80, the off port of the IoT device 5b is port 23, and the open port of IoT device 5c Is port 5555, and the open port of the IoT device 5d is port 5559.

The port scanning step (S100) is to find an open port of IoT devices 5 included in the IoT network. For example, as a result of performing the port scanning step (S100), the open port of the IoT device 5a is port 80, the off port of the IoT device 5b is port 23, and the open port of IoT device 5c Is the port 5555, and the open port of the IoT device 5d is port 5559.

The protocol scanning step S200 is a step for knowing the type of a protocol actually used in an open port. That is, the protocol scanning step S200 is a step of performing the protocol scanning operation described with reference to FIGS. 1 and 2. Meanwhile, the open port is obtained as a result of performing the port scanning step (S100).

For example, the protocol scanning step (S200) performs an operation of finding out the type of a protocol used in port 80, which is an open port of the IoT device 5a. In addition, in the protocol scanning step (S200), the protocol used in port 23 of the IoT device 5b, the protocol used in port 5555 of the IoT device 5c, and port 5559 of the IoT device 5d are used. It performs an operation to find out what protocol is being used. As such, the protocol scanning step (S200) is a step of finding out the type of protocol actually used for all open ports of the IoT devices 5.

The protocol scanning step (S200) includes checking the type of open port, creating a protocol confirmation packet, transmitting the protocol confirmation packet to the IoT device having the open port, and transmitting the protocol confirmation packet. And checking whether there is a response from the IoT device. On the other hand, the step of checking the type of the open port is a step of performing the operation of checking the type of the open port, and the step of creating a protocol check packet is the step of performing the operation of creating the above-described protocol check packet. And, the step of checking whether a response is received from the IoT device is a step of performing an operation of checking whether a response is received from the IoT device. Therefore, a more detailed description of these steps will be omitted.

In the step of checking the type of open port, it is checked whether the open port obtained by the port scanning operation corresponds to a well-known port, a registered port, or a dynamic port. Perform the action

According to one embodiment, the step of determining the type of open port. By referring to the port type data, an operation to find out the type of open port obtained by the port scanning operation is performed.

According to an embodiment, in the step of creating a protocol confirmation packet, an operation of creating a protocol confirmation packet according to the type of open port is performed.

For example, in the step of creating a protocol confirmation packet, the port 80 of the IoT device 5a is a well-known port that uses the World Wide Web HTTP protocol. Performs the operation of creating a protocol confirmation packet.

In addition, in the step of creating a protocol confirmation packet, if there is no response from the IoT device 5a to the protocol confirmation packet created using the web HTTP protocol, port 80 of the IoT device 5a uses the web HTTP protocol. It decides not to do so, and creates a protocol verification packet using a protocol other than the World Wide Web HTTP protocol.

That is, in the step of creating a protocol confirmation packet, in order to find out the type of protocol actually used in the open ports of the IoT devices 5, the protocol confirmation packet is created until a response is received as in the above-described operations. do.

Transmitting the protocol confirmation packet to the IoT device is a step of transmitting the protocol confirmation packet to the IoT device. In the step of transmitting the protocol confirmation packet to the IoT device, the protocol confirmation packet is transmitted until a response from the IoT device is received.

The step of checking whether there is a response from the IoT device that has transmitted the protocol verification packet is to monitor whether a response to the protocol verification packet is received from the IoT device, and when the response is received, the protocol used for the response is transmitted from the corresponding open port. It performs an action that determines that the protocol is actually used.

The type estimation step (S300) is performed by using at least one of the results of performing the photo scanning step (S100) and the protocol scanning step (S200) described above, and each type of the IoT devices 5 This is a step of performing a type estimation operation to estimate. That is, the type estimation step S300 is a step of performing the type estimation operation described with reference to FIGS. 1 and 2.

According to an embodiment, the type estimating step (S300) includes estimating a type of service from a type of a protocol found as a result of performing a protocol scanning operation, and estimating a type of an IoT device from the type of service. do. Here, the step of estimating the type of service from the type of the protocol is a step of performing an operation of estimating the type of service from the type of the protocol described above, and the step of estimating the type of the IoT device from the type of the service is This is a step of estimating the type of IoT device from the type. Therefore, for a detailed description of these steps, please refer to the description of the embodiment of FIGS. 1 and 2.

As described above, the response to the protocol confirmation packet may include at least one of banner information and service information of the IoT device.

According to an embodiment, the Type Assumption step (S300) includes at least one of banner information and service information of an IoT device, a result of performing the above-described photo scanning operation, and protocol scanning ( Protocol Scanning) at least one of the results of the operation is used.

For example, in the type estimation step S300, a first estimation operation, a second estimation operation, a comparison operation, and a type determination operation may be performed. For detailed descriptions of the first estimation operation, the second estimation operation, the comparison operation, and the type determination operation, refer to the description of the embodiment described with reference to FIGS. 1 and 2.

For another example, the type estimation operation S300 may perform a port scanning operation, a protocol scanning operation, a type estimation operation, and a reliability calculation operation. For a detailed description of the first estimation operation, the second estimation operation, the comparison operation, the type determination operation, and the reliability calculation operation, please refer to the description of the embodiment described with reference to FIGS. 1 and 2.

As described above, a person of ordinary skill in the field to which the present invention belongs can make various modifications and variations from the description of the above specification. Therefore, the scope of the present invention is limited to the described embodiments and should not be defined, and should be defined by the claims and equivalents to the claims to be described later.

1: Gateway 3: AP
5: IoT device 100: IoT care device
101: port scanning unit 103: protocol scanning unit
104: IoT device type estimation unit 105: IoT vulnerability analysis unit
107: operating system 109: communication unit
111: computer processor 113: storage
115: memory

Claims (10)

In the method of determining the type of IoT device included in the IoT network,
A port scanning step for finding an open port of an IoT device included in an IoT network;
A protocol scanning step of finding a protocol used in an open port found as a result of performing the port scanning step; And
Including a type estimation step (Type Assumption step) of estimating the type of the IoT device based on the results of the scanning steps,
The protocol scanning step,
The operation of checking the type of the open port, the operation of creating a protocol confirmation packet according to the type of the open port and transmitting the packet to the IoT device having the open port, and the operation of the IoT device. It is a step of performing an operation of checking whether a response to a protocol confirmation packet is received,
The response includes at least one of banner information and service information of the IoT device having the open port,
The banner information or the service information includes information indicating a type of IoT device,
The type estimation step (Type Assumption step),
A first estimation operation of estimating the type of service from the protocol found as a result of performing the protocol scanning step, a second estimation operation of estimating the type of service from information indicating the type of the IoT device, and a first The operation of comparing the type of service estimated by the estimation operation and the type of service estimated by the second estimation operation, and when the comparison results are both different, the open port from information indicating the type of the IoT device To perform an operation of estimating the type of the IoT device having, a method of determining the type of IoT device. The method of claim 1,
The device performing the scanning steps is included in the IoT network, the method of determining the type of the IoT device. The method of claim 1,
The protocol confirmation packet is a script to determine the type of IoT device. The method of claim 1,
The operation of checking the type of the open port is to check whether the open port corresponds to one of a well-known port, a registered port, or a dynamic port. That is, how to determine the type of IoT device. The method of claim 1,
In the protocol scanning step, when there is no response as a result of performing an operation to check whether a response to a protocol confirmation packet is received from the IoT device, another protocol not used in the protocol confirmation packet A method of determining a type of an IoT device to perform an operation of creating a packet for checking a protocol and transmitting it to an IoT device having the open port. delete The method of claim 1,
The method of determining the type of the IoT device further comprising; calculating a reliability, which is a numerical value representing the accuracy of the types of IoT devices estimated by the Type Assumption step. In the IoT care device for determining the type of IoT device included in the IoT network,
A port scanning unit that performs a port scanning operation to find an open port of an IoT device included in the IoT network;
A protocol scanning unit that searches for a protocol used in an open port found by the port scanning operation; And
Includes; a type estimation unit that estimates the type of the IoT device,
The protocol scanning unit,
The operation of checking the type of the open port, the operation of creating a protocol confirmation packet according to the type of the open port and transmitting the packet to the IoT device having the open port, and the operation of the IoT device. It checks whether a response to the protocol check packet is received, and
The response includes service information of the IoT device having the open port, the service information includes information indicating the type of the IoT device, and
The type estimation unit
The first estimation operation of estimating the type of service from the protocol found by the protocol scanning unit, the second estimation operation of estimating the type of service from information indicating the type of the IoT device, and the service estimated by the first estimation operation. The operation of comparing the type of service estimated by the type and the second estimation operation, and when the comparison result is different, estimates the type of the IoT device with the open port from information indicating the type of the IoT device. The IoT care device that determines the type of the IoT device that performs a type determination operation. The method of claim 8,
The IoT care device is included in the IoT network, and the IoT care device determines the type of the IoT device. According to claim 8
The protocol confirmation packet is a script that determines the type of IoT device IoT care device.

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