KR20130052297A - Method and apparatus for processing call connection with subscriber number to prevent voice fishing - Google Patents

Method and apparatus for processing call connection with subscriber number to prevent voice fishing Download PDF

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Publication number
KR20130052297A
KR20130052297A KR1020110117669A KR20110117669A KR20130052297A KR 20130052297 A KR20130052297 A KR 20130052297A KR 1020110117669 A KR1020110117669 A KR 1020110117669A KR 20110117669 A KR20110117669 A KR 20110117669A KR 20130052297 A KR20130052297 A KR 20130052297A
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KR
South Korea
Prior art keywords
call
voice phishing
processing server
subscriber number
subscriber
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KR1020110117669A
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Korean (ko)
Inventor
정옥조
정영식
강신각
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한국전자통신연구원
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Priority to KR1020110117669A priority Critical patent/KR20130052297A/en
Publication of KR20130052297A publication Critical patent/KR20130052297A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/436—Arrangements for screening incoming calls, i.e. evaluating the characteristics of a call before deciding whether to answer it
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/64—Arrangements for signalling the number or class of the calling line to the operator
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2203/00—Aspects of automatic or semi-automatic exchanges
    • H04M2203/60—Aspects of automatic or semi-automatic exchanges related to security aspects in telephonic communication systems
    • H04M2203/6027—Fraud preventions

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)

Abstract

PURPOSE: A call connecting processing method using subscriber numbers and a device thereof are provided to process call connecting by using the subscriber number of a caller. CONSTITUTION: A transmission call processing server(20) receives responses registered as voice fishing registration information from a voice fishing call management server. The transmission call processing server refuses call connection according to a call connecting request signal. The transmission call processing server receives the responses which the voice fishing registration information is not registered as the subscriber number from the voice fishing call management server. The transmission call processing server executes call connection according to the call connecting request signal. [Reference numerals] (10) Transmission terminal; (20) Transmission call processing server; (30) Reception call processing server; (40) Reception terminal; (50) Voice fishing call management server

Description

Method and apparatus for processing call connection with subscriber number to prevent voice fishing for preventing voice phishing

The present invention relates to a call connection processing method and apparatus, and more particularly, to a method for performing call connection processing using a subscriber number, in order to prevent a call number from being modulated for voice fishing, and To the device.

Voice phishing is a phone financial fraud that uses voice and personal information to illegally use personal information over the telephone for crimes, and the damage of vulnerable groups such as the elderly is spreading recently. In particular, the phishers of voice phishing are demanding remittances to victims by impersonating public institutions such as the police department, the civil service office of the Ministry of Justice, and the post office. Victims are sent out by voice phishing scammers using the phone number of a public agency, so when victims call the phone number shown on the phone to verify the fact, they will receive a call from the Office of Civil Affairs and the Civil Affairs Office. . Accordingly, the victims are mistaken for calling from the public agency, and the victims are sending a large amount of money by sending money according to the voice phishers.

To prevent this, the National Police Agency is strengthening the promotion of phone numbers that require attention, but elderly people living in rural areas are suffering from voice phishing due to the impersonation of calling numbers.

Therefore, there is a need for a method of substantially preventing tampering with a reliable telephone number, such as a public agency.

The problem to be solved by the present invention is to provide a method and apparatus for call connection processing that can effectively prevent the modulation of the calling number in the communication service system. In particular, it is an object of the present invention to provide a method and apparatus for performing call connection processing using a subscriber's subscriber number.

Call connection processing method according to an aspect of the present invention for the above problem, when the transmission call processing server receives a call connection request signal from the transmitting terminal, checking the subscriber number of the transmitting terminal; Requesting, by the transmitting call processing server, to confirm whether the subscriber number is registered as voice phishing registration information while providing the subscriber number to the voice phishing call management server; Rejecting a call connection according to the call connection request signal when the subscriber number is received from the voice phishing call management server indicating that the subscriber number is registered as voice phishing registration information; And when the subscriber number is not registered as voice phishing registration information from the voice phishing call management server, the transmission call processing server performing a call connection according to the call connection request signal.

The performing of the call connection includes transmitting, by the transmitting call processing server, a call signal including the calling party number and the subscriber number of the transmitting terminal to a receiving call processing server. Here, the subscriber number is a number assigned to the subscriber and may be a number used when billing. For example, even if the sender arbitrarily changes the calling number, the subscriber number (billing number) is a number that can identify the sender without changing.

In addition, the step of rejecting the call connection may further include the step of changing the originating number to the original subscriber number and sending it to the receiving call processing server.

According to another aspect of the present invention, a call connection processing method includes: receiving, by a receiving call processing server, a call signal including a calling number and a subscriber number from a transmitting call processing server; Requesting, by the receiving call processing server, to confirm whether the subscriber number is registered as voice phishing registration information while providing the subscriber number to the voice phishing call management server; Stopping a call connection to the call signal when receiving the response from the voice phishing call management server that the subscriber number is registered as voice phishing registration information; And receiving a call from the voice phishing call management server that the subscriber number is not registered as voice phishing registration information, and performing a call connection to a receiving terminal corresponding to the call signal.

The step of stopping the call connection may further include transmitting, by the receiving call processing server, information indicating that the call signal is not received or voice phishing to the receiving terminal.

In addition, the method according to another aspect of the present invention, the voice phishing call management server receives a voice phishing notification signal including a subscriber number from at least one receiving call processing server: the number of times that the voice number for the subscriber number reported by voice phishing Generating a credit for the subscriber number based on the step of storing the subscriber number and the credit path as voice phishing registration information. In addition, based on the voice phishing registration information, in response to the confirmation request for the subscriber number provided from the receiving call processing server or the transmitting call processing server, providing a response as to whether the corresponding subscriber number is registered as a voice phishing call. Include.

The managing may further include managing, by the voice phishing call management server, voice phishing registration information by additionally matching a caller ID providing a call connection service to a subscriber number reported as voice phishing.

In addition, the method includes the step of receiving, by the receiving call processing server, a notification from the transmitting terminal that the incoming call is a voice phishing call; And a voice phishing notification signal including a subscriber number of a transmitting terminal related to the incoming call, a calling number, and a transmission provider information corresponding to the transmitting call processing server that has transmitted the incoming call. The method may further include transmitting to the server.

According to an embodiment of the present invention, even in a call connection service including an Internet phone, even if a call connection request is made by modifying a calling number, it is possible to check whether the voice phishing call is based on the subscriber number rather than the calling number, thereby effectively preventing voice phishing damage. It can prevent. Therefore, it is possible to prevent the voice phishing damage due to the outgoing number modulation in the voice communication service, and to provide the notice information to the subscriber by confirming the voice phishing call in advance.

1 is a diagram illustrating a network environment according to an embodiment of the present invention.
2 is a diagram illustrating a general call connection process.
3 is an exemplary view showing a call connection process according to an embodiment of the present invention.
4 is a diagram illustrating a structure of a voice phishing call management server according to an exemplary embodiment of the present invention.
5 and 6 are flowcharts of a call connection processing method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

Hereinafter, a method and apparatus for call connection processing according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a diagram illustrating a network environment according to an embodiment of the present invention.

As shown in FIG. 1, the transmitting terminal 10 receives a call connection service with the receiving terminal 40 through the transmitting call processing server 20 and the receiving call processing server 30. Specifically, the transmission call processing server 20 receives a call request signal from the transmission terminal 10 and transmits a call, and the reception call processing server 30 receives a call from the transmission call processing server 20 and receives the call. By passing to 40, a call is connected between the receiving terminal 40 and the receiving terminal 40. The reception call processing server 30 and the transmission call processing server 30 communicate with the voice phishing call management server 50 to receive information related to voice phishing, and perform call connection processing based thereon.

Next, in this network environment, a general call connection process will be described.

2 is a diagram illustrating a general call connection process.

The transmitting terminal 10 requests a call to the calling number when the call is requested. For example, as shown in FIG. 2, when the transmitting terminal 10 requests a call with a modulated calling number (for example, 9999) rather than a subscriber number (for example, 1111) that it owns, The transmission call processing server 110 transmits the calling number 9999 as it is. In this case, the outgoing call processing server 20 transmits the calling number (9999) and the called number (for example, 2222) to the incoming call processing server 30, and the incoming call processing server 30 receives the called number 2222. After confirming that the number of the subscriber registered as a service, and provides the calling number (9999) information to the receiving terminal 40 having the called party number. At this time, the reception call processing server 30 does not know whether the originating number 9999 of the received call is a normal number or a modulated number, and does not know any information of the transmitting terminal 10 only by the originating number. In addition, the receiving terminal 40 can not determine whether the calling number 999 is a legitimate number, and will suffer damage such as voice phishing.

In an embodiment of the present invention, a call is delivered using a subscriber number in addition to the calling number. Here, unlike the calling number, the subscriber number is a number assigned to the subscriber and is a number that can identify the sender without changing the subscriber number even if the sender arbitrarily changes the calling number. For example, the subscriber number may be a number used for billing. When a subscriber subscribes to a provider that provides communication service, a calling number is assigned to a transmitting terminal corresponding to a terminal identification number assigned at the time of manufacture, and a unique number for identifying the subscriber is assigned. This unique number is used as the number when billing the subscriber and is the subscriber's telephone number that is provided to the customer at the time of subscription to identify the particular subscriber. In the embodiment of the present invention, the number used when billing may be used as the subscriber number, but is not necessarily limited thereto.

3 is an exemplary view showing a call connection process according to an embodiment of the present invention. In particular, it is an exemplary diagram illustrating a process of registering information on a call determined as a voice phishing call with a modulated outgoing number to a voice phishing call management server.

According to the embodiment of the present invention, as shown in FIG. 3, when the transmitting terminal 10 requests the voice call connection to the transmitting call processing server 20, the transmitting call processing server 20 may determine the calling number of the transmitting terminal. For example, a subscriber number (for example, 1111) held by the transmission call processing server 20 as well as 9999 is added to transfer the call to the reception call processing server 120. The reception call processing server 30 stores the calling number and the subscriber number with respect to the received call, and connects the call to the reception terminal 40.

If the receiving terminal 40 recognizes that it is voice phishing in a call with the transmitting terminal 10, the receiving call processing server 30 notifies that the call is a voice phishing call. Specifically, while the calling number and the subscriber number are provided to the receiving call processing server 30, the call generated from the calling number is notified of the voice phishing call. For example, the receiver of the receiving terminal 40 may notify the receiving service provider via telephone or fax that the received call is voice phishing, or may connect to a site provided by the receiving service provider to notify the voice phishing call. Alternatively, if there is a button for reporting a voice phishing call to the receiving terminal 40, the report button may be operated to report the voice phishing call to the receiving call processing server 30 of the receiving operator. As such, voice phishing call related information (voice phishing report signal) notified from the receiving terminal 40 or the receiver of the receiving terminal through various paths is provided to the receiving call processing server 30 of the receiving service provider. 30 registers the voice phishing call related information to the voice phishing call management server 50. The voice phishing call related information may include a subscriber number of a transmitting terminal, a calling number, and information of a transmitting company corresponding to a transmitting call processing server that provided a corresponding call.

Through this process, the information about the voice phishing call is registered in the voice phishing call management server 50. Based on the registered voice phishing call-related information, it is first determined whether the voice phishing call is a voice phishing call. Then, the call is made when it is not a voice phishing call. That is, the reception call processing server 30 checks whether the subscriber number delivered from the transmission call processing server 20 is registered in the voice phishing call management server 50, and if the subscriber number is registered, voice phishing related If it is determined to be a call, it does not reject the call or perform connection processing. In addition, the voice phishing call management server 50 generates and manages the reliability information for the subscriber number and the transmitting service provider based on the registered voice phishing call related information, and makes a call connection based on the reliability information. This will be described in more detail later.

4 is a diagram illustrating a structure of a voice phishing call management server according to an exemplary embodiment of the present invention.

As shown in FIG. 4, the voice phishing call management server 50 according to an exemplary embodiment of the present invention may include a voice phishing call information receiver 51 for receiving related information of a voice phishing call from the reception call processing server 30. Voice phishing reliability generator 52 and voice phishing call for generating the reliability information of the subscriber number of the transmitting terminal and the transmission provider registered with the subscriber number with respect to the voice phishing call received through the receiving call processing server of the receiving operator. It includes a voice phishing information management unit 53 for managing the registered information.

The voice phishing call information receiving unit 51 receives the voice phishing call related information including the calling number, the subscriber number, and the information about the receiving operator corresponding to the receiving call processing server that transmitted the call from the receiving call processing server 30. The voice phishing call information receiving unit 51 provides the received voice phishing related information to the voice phishing information management unit 53 to be stored and managed.

The voice phishing information management unit 53 stores the related transmission provider information corresponding to the subscriber number according to the voice phishing related information, and also stores the calling number that transmitted the call corresponding to the subscriber number, and reports the report date reported by the voice phishing call. Save it.

The voice phishing confidence generation unit 52 generates a reliability for the voice phishing call based on the voice phishing related information stored in the voice phishing information management unit 53. In more detail, a credit for the subscriber number is generated based on the first number of times of accumulating voice phishing and the second number of times of voice phishing reported during the set period. The reliability generated in this way and the data for generating the reliability, that is, the first number and the second number of times, are stored in the voice phishing information management unit 53 corresponding to the subscriber number.

Table 1 below is an exemplary view showing the type of information managed by the voice phishing information management unit 53 according to an embodiment of the present invention.

Subscriber number
(Billing number) Voice phishing
Declaration
Cumulative number Cumulative number of voice phishing in the last week send
Business name Report date Reliability 1111 20,000 500 naze 2011.09.01 30 1234 4500 200 of 2011.08.01 45 5869 80,000 40,000 bottle 2011.09.15 10 (danger)

As illustrated in Table 1 above, for example, the cumulative number of voice phishing reports (first number) “20,000” while recording that a voice phishing call has been generated for subscriber number “1111”, the cumulative number of voice phishing in the last week (2nd frequency) The information of "500", the sender name "value", the report date "2011.9.11", and the reliability "30" is stored and managed in the voice phishing information management unit 53. Information stored in the voice phishing information management unit 53 may be referred to as voice phishing registration information. On the other hand, when the reliability is above the set value, as shown in Table 1, a separate indication such as "risk", it can be emphasized that the call generated by the subscriber number is voice phishing call.

In this way, while generating the reliability in consideration of the number or the occurrence rate of voice phishing for the subscriber number and the transmission provider number, the risk may be further classified by classifying as, for example, trust, normal, risk, and the like. Therefore, the personal subscriber or the transmitting service provider generating a large number of voice phishing calls through the modulation of the calling number has low reliability information. The reception call processing server may take measures such as call rejection for a call received from a subscriber number (for example, a billing number) whose reliability level is dangerous. Through the creation and management of such reliability, the more the outgoing call processing server sends out voice phishing calls, the lower its reliability registered in the voice phishing call management server, therefore, the sending service provider adds voice phishing prevention-related functions and supplements the system. This can cause a circulatory effect. Therefore, it provides the effect of continually reducing voice phishing damage through source number modulation.

Meanwhile, as shown in FIG. 4, the voice phishing call management server 50 receives a request signal for confirming whether the voice phishing originating subscriber is a call from the transmission call processing server 20 or the reception call processing server 30. A call number verification request processing unit 54, a transmission call processing server 20, or a reception call processing server 30 that checks whether or not a voice phishing call is registered based on the subscriber number or the calling number extracted from the received request signal; May further include a provider authentication processing unit 55 for authenticating when accessing the voice phishing call management server 50, and a data providing unit 56 for providing voice phishing call registration information according to a request for data from an external organization. . Here, the data providing unit 56 may provide related information for each transmitting provider, or may provide information on a subscriber number or transmitting provider whose reliability is more than a predetermined value, and in addition to information according to a request of an external organization in various forms. Can be provided.

The voice phishing call management server 50 according to the embodiment of the present invention having such a structure may be operated as a separate server without belonging to one operator, and provides information related to the voice phishing call from a plurality of receiving providers. Can be registered and managed. In addition, the voice phishing call management server 50 may be regarded as a voice phishing suspicion or a voice phishing insufficiency service for a subscriber or a transmitting service provider having a large number of calls reported as voice phishing and having a low reliability level or higher. In this case, by providing detailed information about the subscriber or the transmission provider while providing information about the subscriber or information about the transmission provider to the relevant institutions, the damage caused by voice phishing can be minimized.

Next, a call connection processing method according to an embodiment of the present invention will be described based on such a structure.

In the embodiment of the present invention, when the transmission call processing server 20 transmits a call to the reception call processing server 30, the transmission call processing server 20 provides the subscriber number corresponding to the transmission terminal together with the calling number. The receiving call processing server 30 provides a related subscriber number to the voice phishing call management server 50 with respect to the calling number identified as the voice phishing call to be registered and managed as voice phishing call registration information, thereby modulating for voice phishing. Allows you to check the originating number in advance.

5 and 6 are flowcharts of a call connection processing method according to an embodiment of the present invention. In particular, FIG. 5 is a flowchart of a call connection processing procedure for preventing a call by a modulated origination number by a receiving call processing server, and FIG. Flow chart of the process.

First, a processing method of connecting a call in order to prevent a call with a modulated originating number by the reception call processing server will be described.

As shown in FIG. 5, when the reception call processing server 30 receives a call received from the transmission call processing server 20 to the reception terminal 40 of its subscriber (S100), the subscriber receives from the received incoming signal. Acquire a number (S110). For example, the incoming signal includes the calling number and the subscriber number for the sender who requested the call connection.

The reception call processing server 30 transmits the obtained subscriber number to the voice phishing call management server 50 and requests confirmation of whether the number is registered as voice phishing (S120). The confirmation request processing unit 54 of the voice phishing call management server 50 searches for the voice phishing information management unit 53 based on the subscriber number transmitted according to the confirmation request from the reception call processing server 30 and receives the confirmation request. It is determined whether the subscriber number is registered as voice phishing registration information. As a result of the search, if the corresponding subscriber number is registered as voice phishing registration information, it is notified to the reception call processing server 30. In this case, the subscriber number may be notified of the reliability of the corresponding subscriber number together with the result that the subscriber number is registered as the voice phishing registration information. On the other hand, the voice phishing management server 50 performs a separate authentication for the corresponding call processing server 30 in accordance with the confirmation request from the incoming call processing server 30, and if the authentication is notified, the result according to the confirmation request can do.

When the reception call processing server 30 receives a response from the voice call management server 50 to the subscriber number of the requested incoming call from the transmission call processing server 20, the corresponding subscriber number is voice phishing registration information (S130). The connection of the incoming call is stopped (S140). In addition, the reception call processing server 30 may notify the reception terminal 40 that a call connection request for the calling number has been made. In this case, guide information (eg, text, voice, CID, etc.) that the call by the corresponding calling number is suspected to be voice phishing may be provided to the receiving terminal 40.

On the other hand, when the reception call processing server 30 receives a response from the voice call management server 50 that the subscriber number is not voice phishing registration information with respect to the subscriber number of the incoming call requested from the transmission call processing server 20, the corresponding call number is received. Normal connection processing of the incoming call is performed so that a call connection between the transmitting terminal 10 and the receiving terminal 40 is made (S150).

Next, a description will be given of a method of processing a call connection in order to prevent a call by the originating call processing server from being modulated.

As shown in FIG. 6, when a call connection request signal is received from the transmitting terminal 10 (S200), the transmitting call processing server 20 sets the subscriber number of the transmitting terminal 10 according to the call connection request signal. Acquire (S210). For example, the call connection request signal includes a terminal identification number together with the calling number. The transmission call processing server 20 obtains the subscriber number corresponding to the terminal identification number included in the call connection request signal from the subscriber information managed by itself.

The transmission call processing server 20 transmits the obtained subscriber number to the voice phishing call management server 50 and requests confirmation of whether the number is registered as voice phishing (S220). In response to this request, the voice phishing call management server 50 determines whether the transmitted subscriber number is registered as voice phishing registration information, and notifies the transmission call processing server 20 of the determination result. In this case, the subscriber number may be notified with the result that the subscriber number is registered as voice phishing registration information and the reliability of the corresponding subscriber number. On the other hand, the voice phishing management server 50 performs separate authentication for the corresponding call processing server 20 according to a request for confirmation from the sending call processing server 20, and notifies the result according to the request for confirmation when it is authenticated. can do.

When the transmission call processing server 20 receives a response from the voice phishing management server 50 to the subscriber number of the requested call from the transmission terminal 30, indicating that the subscriber number is voice phishing registration information (S230), the call connection is performed. Reject the request (S240). In this case, the transmission call processing server 20 additionally performs a separate authentication step when receiving the response that the corresponding subscriber number is the voice phishing registration information and the reliability is also lower than the set level, and the calling number is modulated according to the authentication result. Calls that are considered phishing calls can be removed.

In addition, the outgoing call processing server 20 checks the original outgoing number for the transmitting terminal based on the subscriber number to confirm whether the outgoing number of the current call has been tampered with, and if so, replaces the outgoing number of the current call with the subscriber's number. A call connection may be requested while changing and forwarding the call to the reception call processing server 30.

On the other hand, when receiving a response from the voice phishing management server 50 to the subscriber number of the transmitting terminal 10 that the subscriber number is not voice phishing registration information, the transmission call processing server 20 performs normal connection processing of the incoming call. In order to perform the call connection request while adding the subscriber number to the call signal to the reception call processing server 30 (S250). Accordingly, a normal call connection is made between the transmitting terminal 10 and the receiving terminal 40.

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (1)

When the transmitting call processing server receives the call connection request signal from the transmitting terminal, checking the subscriber number of the transmitting terminal;
Requesting, by the transmitting call processing server, to confirm whether the subscriber number is registered as voice phishing registration information while providing the subscriber number to the voice phishing call management server;
Rejecting a call connection according to the call connection request signal when the subscriber number is received from the voice phishing call management server indicating that the subscriber number is registered as voice phishing registration information; And
When the subscriber number is not registered as voice phishing registration information from the voice phishing call management server, the transmission call processing server performing a call connection according to the call connection request signal;
Call connection processing method comprising a.
KR1020110117669A 2011-11-11 2011-11-11 Method and apparatus for processing call connection with subscriber number to prevent voice fishing KR20130052297A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150056157A (en) * 2013-11-15 2015-05-26 주식회사 다날 Calling number tamper-proof based call blocking control device and method
CN111435960A (en) * 2018-12-25 2020-07-21 马上消费金融股份有限公司 Method, system, device and computer storage medium for identifying user number state

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150056157A (en) * 2013-11-15 2015-05-26 주식회사 다날 Calling number tamper-proof based call blocking control device and method
CN111435960A (en) * 2018-12-25 2020-07-21 马上消费金融股份有限公司 Method, system, device and computer storage medium for identifying user number state
CN111435960B (en) * 2018-12-25 2021-08-17 马上消费金融股份有限公司 Method, system, device and computer storage medium for identifying user number state

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