RU175052U1 - VIDEO DOMOFON WITH PROTECTION AGAINST UNAUTHORIZED ACCESS - Google Patents

Abstract

REFERENCE VIDEO DOMOOPHONE WITH PROTECTION FROM UNAUTHORIZED ACCESS Useful model refers to the technique of protecting premises and other objects from unauthorized access. The technical result of the proposed utility model is to protect the intercom from unauthorized opening of the door lock. The solution to the technical problem in the doorphone with protection against unauthorized access, containing a calling panel, consisting of a bracket in the form of a plate, with the possibility of fixing its mounting surface to the wall, and a front panel consisting of a fixed and a rotary part, and the rotary part has a cylindrical shape with the possibility rotation around its axis, and it contains a circuit board with a processor, camera, microphone, speaker, call button, IP intercom connection interface mounted on it network, and the calling panel is connected with the executive body of the entrance door lock, it is achieved by the fact that the diagonal of the square hole of the front panel under the camera lens is less than 4.5 mm, there is a unit for decrypting the control signal of the calling panel and issuing an analog signal to the executive body of the castle, the calling panel connected to the unit for decrypting the control signal of the calling panel and issuing an analog signal to the actuator of the lock by a twisted pair cable with a 1-wire interface, the front panel is fastened to the bracket the screw is located vertically inside the calling panel in its lower part so that the distance from the screw head to the outer surface of the front panel is more than 20 mm, and the bottom panel has a hole coaxial to the screw, the distance from which to the mounting surface of the bracket is less than 10 mm, and the bracket and front panel are made of metal. 9 ill.

Description

IPC G07C9 / 00

H04B7 / 26

H04M1 / 64

PROTECTED VIDEO INTERCOMPhone

FROM UNAUTHORIZED ACCESS

The utility model relates to techniques for protecting premises and other objects from unauthorized access.

A well-known analogue is the door locking system, RF patent No. 2379852, 01/20/2010, containing an electric drive lock installed on the door, a multi-subscriber audio-video entry phone with a built-in camera, a data storage server and dispatcher computer equipment connected to the switch, subscriber equipment installed in the apartment consisting of an IP phone and a video surveillance terminal connected to a subscriber switch, a multi-subscriber audio-video intercom is connected to an electric lock, a multi-subscriber audio-video intercom with the built-in television camera is also connected to a video server that processes and records video data from the doorphone camera, the audio channel of a multi-subscriber audio-video doorphone is connected to the IP-telephony adapter, the subscriber switch, video server and IP-telephony adapter are connected to the switch to which the IP-PBX is connected, while The IP telephone and the video monitoring terminal, which are part of the subscriber equipment, the data storage server, the computer equipment of the dispatcher, the video server and the IP telephony adapter are assigned unique IP addresses and, at the same time multiabonent audio video phone has a digital port connected via an Ethernet adapter and switch to TCP / IP network to which are connected through the switch and the storage server and computer equipment manager.

A disadvantage of the analogue is that video intercoms similar to the above analogue have a low degree of protection against hacking due to the presence of a glass or plastic panel on the outer surface of the door station.

A close analogue of the proposed technical solution is the HIKVISION doorphone - HIKVISION DS-KB8112-IM, the calling panel of which consists of a bracket in the form of a plate, with the possibility of fixing its mounting surface to the wall, and a front panel consisting of a fixed and a rotary part, and the rotary part has a cylindrical shape with the ability to rotate about its axis, and it contains a circuit board with a processor, camera, microphone, speaker, call button, interface for connecting to a doorphone mounted on it constant IP network, with outdoor panel is connected with the executive body of the castle door.

The disadvantage of the prototype is the lack of security of the intercom from unauthorized opening of the front door lock. If the attackers broke the door panel, and then remained stuck, for example, twisted pair and the control wire of the executive body of the lock, then to open the lock it is enough to close this wire in the case of a normally closed lock, or open in the case of a normally open lock. Moreover, the case of the analogue calling panel is easy to disassemble by unscrewing its front panel

The technical result of the proposed utility model is to protect the intercom from unauthorized opening of the door lock.

The solution to the technical problem in the doorphone with protection against unauthorized access, containing a calling panel, consisting of a bracket in the form of a plate, with the possibility of fixing its mounting surface to the wall, and a front panel consisting of a fixed and a rotary part, and the rotary part has a cylindrical shape with the possibility rotation around its axis, and it contains a circuit board with a processor, camera, microphone, speaker, call button, IP intercom connection interface mounted on it network, and the calling panel is connected with the executive body of the entrance door lock, it is achieved by the fact that the diagonal of the square hole of the front panel for the camera lens is less than 4.5 mm, there is a unit for decrypting the control signal of the calling panel and converting it into an analog signal for the executive body of the castle, calling the panel is connected to the decryption unit of the control signal of the calling panel and converting it into an analog signal to the actuator of the lock by a twisted pair cable with a 1-wire interface, fixing the front panel to the CD the bracket is carried out by a screw, which is located vertically inside the calling panel in its lower part so that the distance from the screw head to the outer surface of the front panel is more than 20 mm, and in the bottom panel there is a coaxial screw hole from the bottom, the distance from which to the mounting surface of the bracket is less than 10 mm , and the bracket and front panel are made of metal.

Figure 1 shows a General view of the intercom with protection against unauthorized access.

Figure 2 shows a cross section of the calling panel of the intercom.

Figure 3 shows the bracket of the calling panel.

Figure 4 shows the bracket of the calling panel, mounted to a wall with twisted pair (containing Ethernet and 1-wire interfaces).

Figure 5 shows the movable and fixed parts of the front panel.

Figure 6 shows the viewing angle of the camera of the calling panel and the angle of rotation of the rotary part of the front panel.

Figure 7 shows the process of attaching the front panel to the calling panel bracket.

On Fig shows the connection of the front panel with the bracket of the calling panel.

Figure 9 shows the hole in the front panel for the screw attaching the front panel to the calling panel bracket.

The intercom system with protection against unauthorized access contains a calling panel 1, consisting of a bracket 2 in the form of a plate, with the possibility of fixing it with its mounting surface to the wall, and a front panel 3, consisting of a fixed 4 and a rotary 5 parts, the rotary part 5 having a cylindrical shape with the possibility of rotation about its axis 6, and it contains a mounting plate 7 with a processor 8, a camera 9, a microphone 10, a speaker 11, a call button 12, an interface 13 for connecting to an intercom IP network mounted on it, and you the call panel 1 is connected with the executive body of the lock of the front door 14, achieved by the fact that the diagonal of the square hole 15 of the rotary part 5 of the front panel 3 under the camera lens 9 is less than 4.5 mm, the call panel 1 is connected to the decryption unit 16 of the control signal of the call panel and converting it into an analog signal to the actuator of the lock 14 by a twisted pair 17 with a 1-wire interface, with the possibility of transmitting a unique code, the front panel 3 is attached to the bracket 2 by a screw 18, which is located vertically inside of the calling panel 1 in its lower part so that the distance from the screw head 18 to the outer surface of the front panel 3 is more than 20 mm, and in the fixed part 4 of the front panel there is a hole 19 coaxial to the screw 18, the distance from which to the mounting surface of the bracket 2 is less than 10 mm , and the bracket and front panel are made of metal.

Consider an example of a specific implementation of an intercom system with protection against unauthorized access. The bracket 2 of the housing is made of 2 mm sheet steel. The fixed 4 and rotatable 5 parts of the front panel 3 are made of cast aluminum alloy. The relatively small size (4.5 mm diagonal) of the hole 15 for the camera lens 5 and its square shape, which helps optimize the area of the hole to the visible area of the image, make the camera inaccessible for attackers. With such dimensions, the camera is hidden from possible damage that an attacker can inflict, and the probability of opening the door panel through camera damage is minimized. To ensure the required viewing angle under these conditions, the part of the front panel 3 in which the camera 9 is located is made rotatable 5. In well-known analogs, one of which is a prototype of the device, touching the lens or the protective glass of the lens leads to its pollution and a sharp deterioration in image detail. In this technical solution, this factor is minimized. The interface 13 for connecting to the doorphone IP network is an Ethernet interface with an 8P8C connector, and physically the doorphone is connected to other devices of the doorphone network using a twisted pair cable. Doorphone IP-network is a LAN network that combines the doorphone and telephone sets of the doorphone network installed in the apartments of the house in which the network is installed. Block 16 decryption of the control signal of the door panel and converting it into an analog signal to the actuator of the lock is a controller that reads the encrypted signal of the processor 8 of the door panel 1 to open the door and generates an analog signal to the actuator of the castle 14. The decryption unit 16 is located indoors. The executive body of the lock 14 is a solenoid, which, when voltage is applied to it, acts on the lock mechanism. The signal of the call panel 1 to the decryption unit 16 is transmitted via twisted pair 17 through the 1-wire interface. The decryption unit 16 includes a twisted pair 17 from the call panel 1 of the intercom. Twisted pair 17 contains 2 interfaces: network Ethernet and 1-wire. The 1-wire signal is decrypted by the decryption unit 16 and goes to the lock 14 through two wires. Ethernet goes unchanged further to connect to the doorphone network.

Consider an example of operating an intercom with protection against unauthorized access. First, the bracket 2 of the calling panel 1 is fixed to the wall near the entrance door to the room, as shown in Figs. 3 and 4. To ensure reliable protection against unauthorized access, twisted pair 17 is laid inside the wall and is not visible from the outside, in Fig. 4 it is shown for illustration. The bracket 2 is based on the mounting surface on the wall and fastened with screws through the holes 20. Then, a twisted pair 17 containing 1-wire and Ethernet interfaces is fixed. The rotary part 5 of the front panel 3 is inserted into the fixed part 4 of the front panel 3, as shown in Fig. 5 and fixed at a certain angle α, as shown in Fig. 6 using notches 21 located on the fixed 4 and rotatable 5 parts of the front panel 3. After that, the front panel 3 assembly is mounted on the bracket 2 and fixed with a screw 18.

The screw 18 is located at a distance of more than 20 mm from the hole 19. Without knowing the slot and size of the screw 18, it is very difficult to disassemble the calling panel by selecting a tool, and when using a screw with a special slot, it is impossible. In the analogue, the screw is located next to the surface of the front panel, it is visible and easily accessible. In other analogues, the screw is slightly deepened. In the front panel 3 there is no direct channel to the screw head 18. Given the lower location of the screw 18, it is rather difficult to illuminate the screw 18 from below in order to see the shape and size of the slot. To do this, it is necessary that the light source and view are directed from one point. The presence of a channel in the front panel makes this task simple, because even if the screw 18 is deep, through the reflections in the channel it is easy to highlight the screw head 18. The described feature, which differs from the analogue, increases protection against unauthorized opening of the door panel 1 and the opening of the door lock 10.

The visitor, going to the closed entrance door with a nearby intercom system with protection against unauthorized access, presses the call button 12. The owner responds to him from the inside of the room using the telephone of the intercom network. At the same time, the owner has the opportunity to see the visitor due to the presence of the camera 9 and conduct a conversation with him thanks to the microphone 10 and the speaker 12. If it is necessary to open the door to the visitor, the owner gives a signal through the doorphone IP network to the processor 8 of the call panel 1, which gives an encrypted signal to the unit 16 decryption of the control signal, which gives an analog signal to the Executive body of the lock 14 of the front door.

Consider the options for attempting unauthorized access to open the front door, which is served by a doorphone with protection against unauthorized access. Option No. 1 - attackers try to disassemble the calling panel 1. To do this, they need to find the hole 19 and determine the slot of the screw 18, with which the front panel 3 is attached to the bracket 2. It is difficult to do this, since the head of the screw 18 is more than 20 mm from the outer the surface of the front panel 3, and the distance from the hole 19 to the mounting surface of the bracket 2 is less than 10 mm. Given these conditions, it is practically impossible for attackers to combine the light flux from the lighting device to illuminate the screw head 18 and the field of view. Option number 2 - attackers try to break the most vulnerable element of the call panel - camera 9. Thanks to the small hole 15, the camera 9 is very difficult to damage, a special tool is needed. Even if they manage to damage the camera 9, it is impossible to access the processor 8 and the elements of the 1-wire bus in order to read the unique code when the door is opened through the small hole 15. Option No. 3 - attackers damage the calling panel 1 with a heavy tool, after which twisted pair 17 remains. To open the lock 14, it is necessary to pass the code through the 1-wire bus through the twisted pair 17 to open the lock 14. Each instance of the control signal decryption block 16 of the door panel and converting it into an analog signal to the actuator of the lock 14 has a unique 16-bit code corresponding to the code of the door panel 1, which is generated during commissioning of the device and is unknown to either the user or the manufacturer, the poet th it can not be stolen at work or from the user. When an attacker submits the wrong code, the control of call panel 1 is blocked for 120 seconds. In total, there are 65,536 code combinations; therefore, to crack codes for opening a lock, 14 attackers will need 92 days of continuous work, which means that it is practically impossible to open it in this way.

The achievement of the technical result in the intercom with protection against unauthorized access is due to the fact that:

- the diagonal of the square hole of the front panel under the camera lens is less than 4.5 mm,

- there is a block decryption of the control signal of the call panel and the issuance of an analog signal to the executive body of the castle,

- the calling panel is connected to the decryption unit of the control signal of the calling panel and issuing an analog signal to the lock actuator by a twisted pair cable with a 1-wire interface, with the possibility of transmitting a unique code,

- fixing the front panel to the bracket of the housing is carried out by a screw, which is located vertically inside the housing in its lower part so that the distance from the screw head to the outer surface of the front panel is more than 20 mm, and in the bottom panel there is a hole from the bottom of the coaxial screw, the distance from which to the installation bracket surface is less than 10mm,

- the bracket and front panel are made of metal.

Claims (1)

1 Intercom system with protection against unauthorized access, comprising a calling panel consisting of a bracket in the form of a plate, with the possibility of fixing it with its mounting surface to the wall, and a front panel consisting of fixed and rotary parts, the rotary part being cylindrical with the possibility of rotation relative to its axis, and it contains a circuit board with a processor, camera, microphone, speaker, call button, interface for connecting to an intercom IP network mounted on it, and a call panel l is connected with the executive body of the entrance door lock, characterized in that the diagonal of the square hole of the front panel for the camera lens is less than 4.5 mm, there is a unit for decrypting the control signal of the calling panel and converting it into an analog signal for the executive body of the castle, the calling panel is connected to the unit decryption of the control signal of the call panel and converting it into an analog signal to the actuator of the lock by twisted pair with 1-wire interface, the front panel is attached to the bracket in a screw, which is located vertically inside the calling panel in its lower part so that the distance from the screw head to the outer surface of the front panel is more than 20 mm, and the bottom panel has a hole coaxial to the screw, the distance from which to the mounting surface of the bracket is less than 10 mm, and the bracket and front panel are made of metal.

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