KR20110045656A - Spam filtering system for preventing filtering of a legal sms and spam filtering method thereof - Google Patents

Abstract

PURPOSE: A spam filtering system for preventing filtering of a legal SMS and a spam filtering method thereof are provided to prevent the blocking of a legal SMS such as a guidance message issued by a government or a public agency. CONSTITUTION: A spam filter server(400) judges based on a spam judgment information whether or not a message is legal. If so, the spam filter server transmits to a message center the information that the message is not a spam message. If the message is not the legal message, the spam filtering server performs the spam filtering process for the message. The spam filter sever transmits to the message center based on the result the message which indicates whether or not the message is a spam message.

Description

Spam filtering system to prevent legitimate short message filtering and spam filtering method using the same {SAM FILTERING SYSTEM FOR PREVENTING FILTERING OF A LEGAL SMS AND SPAM FILTERING METHOD THEREOF}

The present invention relates to a spam filtering system and a spam short message processing method for blocking a spam short message.

As the short message service in the mobile communication is activated, the mobile terminal user can transmit and receive information through text as well as conventional voice. However, complaints of mobile terminal users are increasing because spam short messages that are not intended to be received are often transmitted due to a negative phenomenon caused by short message services. Accordingly, technologies for blocking spam short messages that the recipient does not want are being developed.

There are two main techniques for blocking spam short messages. In the early days, techniques for blocking spam short messages in mobile communication terminals were mainly devised. According to this technique, after the mobile terminal receives the short message, the mobile terminal determines whether the received short message includes a caller number corresponding to the received short message by including a caller number corresponding to the received short message. The mobile terminal performs the short message rejection processing. Similarly, after receiving the short message, the mobile terminal performs the short message rejection processing when a string matching the string stored in the reject string database exists in the short message. However, according to the related art, the capacity of the mobile terminal is limited, so that the number or character string that can be stored is limited, and there is a problem in that the mobile terminal determines whether or not to reject the message.

Recently, in addition to determining whether a message is spam in a mobile terminal, a technique for determining whether a message is spam in a mobile communication network has been developed. The spam filtering system for a mobile communication network includes (1) receiving a short message, (2) filtering the short message based on at least one rule set, and (3) based on the filtering result. It is common to consist of three steps of the short message spam filtering method including the step of processing the short message. In the filtering step, the received short message is buffered to collect main parameters from the message, and a rule set is applied thereto to obtain a result of the filtering.

As described above, when the spam filtering system performs spam filtering in advance in the mobile communication network before going to the called terminal, the disadvantages of the spam filtering in the mobile terminal itself, that is, the capacity of the mobile terminal is limited and the number or character string can be stored. Not only this is limited, but the problem of determining whether or not to reject a message by the mobile terminal has been solved. However, despite these conveniences, new side effects occur as spam filtering is performed in advance in mobile communication networks. One of them is that the customer does not receive the notification letter that must be received.

For example, if a customer does not pay a credit card payment that is due every month, the card company sends a short message to the customer informing him of the late payment. However, if the condition is set by the spam filtering system to block words such as “due money,” the customer cannot receive short messages from the credit card, in which case the customer cannot check the short messages in a timely manner and pay the usage fee. Later, you will be inconvenient to pay the late fees and late fees.

The present invention has been made in view of the above circumstances, and an object of the present invention may not block a short message for legitimate guidance purposes, such as a guidance message in a financial sector or a guidance message sent by a government or a public institution, as described above. The present invention provides a spam filtering system and a spam filtering method.

The spam filtering system according to the present invention for achieving the above object is a system for filtering a message transmitted by a calling terminal to a called terminal, after receiving a message from the calling terminal, after extracting the spam determination information from the message spam A message center for transmitting to the filtering server; And determining whether the message is a legitimate message based on the spam judgment information, and if the message is a legitimate message as a result of the legitimate message determination step, transmit information indicating that the message is not spam, and the message is legitimate. If the message is not a message, and after performing the spam filtering process for the message, based on the result includes a spam filtering server for transmitting whether it is a spam character to the message center.

In addition, after receiving the message from the calling terminal, the message center queries the subscriber server whether the called party, the owner of the called terminal, subscribes to the spam blocking service, and if the called party subscribes to the spam blocking service from the subscriber server. If it is confirmed that the spam determination information is preferably delivered to the spam filtering server.

The message center preferably transmits the message to the called terminal when receiving the non-spam text from the spam filtering server, and blocks the message when receiving the spam text.

The spam filtering server according to an embodiment of the present invention is a spam filtering server that determines whether or not a message to be sent to a called terminal is spam. The spam determination information is received after receiving the spam determination information corresponding to the message. Determining whether or not the message is a legitimate message, if the message is a legitimate message, and transmits the information that the message is not spam, and if the message is not a legitimate message, spam filtering for the message It is desirable to carry out the process and send the message center whether it is spam or not.

The spam filtering server may include a function of receiving and storing legitimate message information from an input terminal, and determining whether the message is a legitimate message based on a comparison result of the spam determination information and the previously stored legitimate message information. Do.

The spam filtering server may include a legal message input unit configured to receive and store legal message information from the input terminal; And receiving and storing the stored legal message information from the legal message input unit, comparing the spam determination information with the previously stored legal message information to determine whether the message is a legal message, and when the message is a legal message. It is preferable to include a spam filtering unit which transmits information that is not spam text to the message center directly and, if the message is not a legitimate message, performs a spam filtering process on the message and transmits whether it is spam text to the message center. .

The legitimate message input unit may include an authentication unit that determines whether the input terminal is an authenticated terminal; A legal message temporary DB for storing the received legal message information; And an uploading unit which transmits the legitimate message information to the spam filtering unit at a predetermined time, wherein the spam filtering unit stores a legitimate message information transmitted from the legitimate message input unit; And a spam determination unit that compares the legitimate message information included in the legitimate message DB with the spam determination information and performs a spam filtering process on the message and whether the message is a legitimate message.

The legitimate message input unit may further include a legitimate message verifier that verifies and manages legitimate message information stored in the legitimate message temporary DB.

The spam determination information may include any one of a calling number and a reply number extracted from the message and the content of a short message. The legitimate message information may include a calling number and a reply number input from the input terminal. Characterized in that any one of the number and the content of the short message, the spam filtering server is determined to be a legitimate message when the same data as the spam determination information is included in the legitimate message information, the spam determination If the same data as the information is not included in the legal message information, it is preferable to determine that the legal message is not a legal message.

The external input terminal is preferably any one of a bank terminal, a public institution terminal, a government agency terminal, and a communication service provider terminal.

Meanwhile, the method for filtering spam according to an embodiment of the present invention is a method for filtering a message transmitted by a calling terminal to a called terminal, and after the message center receives the message from the calling terminal, extracts spam determination information from the message. Extracting spam judgment information; Spam determination information delivery step of the message center delivers the spam determination information to a spam filtering server; Determining, by the spam filtering server, whether the message is a legitimate message based on the spam determination information; And as a result of the legitimate message determination step, if the message is a legitimate message, transmits information indicating that the message is not spam, and if the message is not a legitimate message, performs a spam filtering process on the message. And determining whether or not spam is transmitted to the message center based on the result.

In addition, the spam filtering server further includes a legitimate message input step of receiving and storing legitimate message information from an input terminal, wherein the legitimate message determining step is based on a result of comparing the spam determination information with the previously stored legitimate message information. It is desirable to determine whether it is a legitimate message.

And the spam determination information includes any one of a calling number and a reply number extracted from the message and the content of a short message.

The legal message information may include any one of a calling number and a reply number received from the input terminal and the content of a short message.

In the legitimate message determination step, when the same data as the spam determination information is included in the legitimate message information, the legitimate message is determined, and when the same data as the spam determination information is not included in the legitimate message information. It is desirable to judge that it is not a legitimate message.

The method may further include an input terminal authentication step of determining whether the input terminal is an authenticated terminal, and the legitimate message input step may be performed only when the input terminal is authenticated.

The method may further include a valid message information verification step of determining the pre-stored legal message information.

Further, when the message center receives the information that the message is not spam text from the spam filtering system, the message is sent to the called terminal, and when receiving the information called spam text, the message processing step of blocking the message further It is preferable to include.

And after the message center receives the message from the calling terminal, a blocking service subscription determining step of inquiring whether the called party, which is the owner of the called terminal, subscribes to the spam blocking service to the subscriber server. The extracting step is preferably performed when it is confirmed from the subscriber server that the called party subscribes to the spam blocking service.

As described in detail above, when the spam filtering system according to the present invention is used, a short message for legal guidance purposes, such as an essential guidance message, that is, a guidance message from the financial sector or a guidance message sent by the government and public institutions, is blocked. In this case, the normal short message is blocked, and as a result, spam discrimination accuracy of the spam filtering service is improved.

Hereinafter, a spam filtering system and a spam filtering method according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram illustrating a spam filtering system according to the present invention.

The calling terminal 100 is a terminal for transmitting a short message. After the short message is created, the calling terminal 100 transmits the short message to the called terminal 110 using the mobile communication network 200.

That is, the short message prepared by the calling terminal 100 passes through the short message center (SMS center, 300) through the communication network 200, and then passes through the communication network 200 and the receiving terminal 110 receives.

Meanwhile, after receiving the message from the mobile communication network 200, the short message center 300 according to an embodiment of the present invention joins the spam blocking service to the subscriber server 310 as the owner of the called terminal. If it is confirmed that the called party subscribes to the spam blocking service from the subscriber server 310, information necessary for determining whether the short message is spam, that is, the calling number, the reply number, and the short message Spam determination information including the contents, Callback URL address, etc. inserted in the short message is transmitted to the spam filtering server (400). Here, the subscriber server 310 refers to a server that mainly maintains subscriber information in a database, such as a home location register (HLR).

Subscriber server 310 is a basic equipment of the mobile communication network to check the location of the mobile communication subscriber to receive a call and at the same time to grasp the various information about the subscriber to control various additional services such as incoming, outgoing, etc. Includes or has subscribed to an anti-spam service.

The input terminal 320 is a terminal of an institution that has been previously authenticated by a telecommunications operator operating the filtering server 400, and is mainly a bank, a public institution, or a government. In this way, the pre-certified organization registers the legitimate message information including the content of the short message to be sent to the majority and the sending and replying number before sending the short message to prevent the message from being blocked by the spam filtering system. It's a system that makes it possible. Of course, the operators operating the spam filtering server 400 may directly input legitimate message information.

The spam filtering server 400 includes a legitimate message input unit 410 and a spam filtering unit 420.

The legal message input unit 410 receives and stores legal message information from the input terminal 320. For example, it receives the data consisting of (reply number, short message content) from the input terminal 320, and stores it in the embedded database. Meanwhile, the stored data are uploaded to the spam filtering unit 420 at predetermined intervals.

The spam filtering unit 420 receives and stores the stored legal message information from the legal message input unit 410, and later, when spam determination information is received from the SMS center 300, the spam determination information is stored in the previously stored legal message. Determine whether it is included in the message information. If it is included in the determination result, this is a legitimate message, such as a guide message that the pre-authenticated input terminal 320 to send. Therefore, in this case, the information that is not spam is sent directly to the SMS center 300 without going through the process of spam filtering. In this case, the message is transmitted to the called terminal 110 without being filtered.

On the contrary, if the spam determination information is not included in the previously stored legal message information, it is determined whether or not the spam processing is performed by searching through the spam filtering process as before, that is, whether a keyword indicating spam is included.

2 is a block diagram of a spam filtering server according to an embodiment of the present invention.

The spam filtering server 400 according to an embodiment of the present invention includes a legitimate message input unit 410 and a spam filtering unit 420 as described above.

The legal message input unit 410 further includes an authentication unit 412, a legal message temporary DB 414, a legal message verification unit 416, and an uploading unit 418.

The authentication unit 412 determines whether the input terminal 320 is an authenticated terminal when the input terminal 320 accesses the spam filtering server 400. In general, it is possible to query the input terminal 320 with an ID and password, and in response to this, it is possible to determine whether the input terminal 320 is a pre-authenticated terminal. Of course, the present invention is not limited thereto, and all methods for authenticating a certificate and other terminals are possible.

The legal message temporary DB 414 stores the legal message information input by the input terminal 320. The legal message information may include any one of a calling number and a reply number and the content of a short message. For example, if the legitimate message information consists of a reply number and a short message content, the input terminal 320 will display a display window for inputting the reply number and the short message content, while the legitimate message temporary DB 414 will reply. Data consisting of two fields: number and short message content will be accumulated.

The legal message verification unit 416 performs a function of verifying and managing legal message information stored in the legal message temporary DB 414. In other words, even if a specific institution is given access to the spam filtering system, the legitimate message input by the institution is not always applied and needs to be verified at times.

For example, bank A has given access to the spam filtering server 400, but bank A does not always send a short message. It is also possible to send a text message of advertising rather than the necessary message, the operator of the spam filtering server 400 reviews the legitimate message stored in the legitimate message temporary DB, and delete the legitimate message from the legitimate message temporary DB if it is not really necessary. Etc.

The uploading unit 418 transmits the legitimate message information to the spam filtering unit at a predetermined time.

The spam filtering unit 420 may further include a legitimate message DB 422 and a spam determination unit 424.

The legal message DB 422 stores the legal message information transmitted from the legal message input unit.

The spam determination unit 424 includes a general spam filtering function. In other words, it performs a function of determining whether the message is spam or not by comparing the specific information of the message, for example, the calling party number and the content of the message. The present invention further includes a function of determining whether the message is a legitimate message by comparing the legitimate message information included in the legitimate message DB 422 with the spam determination information transmitted from the SMS center 300.

That is, before proceeding with the general spam determination process, it is first determined whether it is a legal message, and if it is not a legal message, the general spam determination process is characterized.

3 is a flowchart illustrating a spam short message processing method according to an embodiment of the present invention.

First, the authorized authority to send a message such as a guide message stores the legal message after accessing the filtering server 400 through its input terminal 320 (S510). At this time, the filtering server 400 performs an input only when the input terminal 320 is authenticated. Authorized institutions, that is, major governments such as government agencies can be changed from time to time, the manager manages the authentication information of the input terminal 320 from time to time. Therefore, the authentication information (for example, the ID or password or the unique number of the terminal) of the terminal of the newly authenticated authority is added, or the management such as deleting the authentication information is performed.

The legal message information may use a calling number, a reply number, a content of a short message, and a callback URL address embedded in a short message. Hereinafter, for convenience, the message is described with a reply number and a content of a short message. The input legal message information is stored in the legal message input unit 410 of the spam filtering server 400 (S515). The legal message input unit has a built-in database with two fields, a reply number and a message, so that the legal message information continues to accumulate.

Then, the operator of the spam filtering server 400 verifies the legal message information and deletes it from the database in the case of advertisement content (S517).

Thereafter, the legal message information pre-stored in the legal message input unit 410 is uploaded to the spam filtering unit 420 at predetermined intervals (S520). This step is a necessary step to keep the spam filtering unit 420 performing the conventional spam filtering function as it is, and to physically place the legal message input unit 410 newly, and is not an essential process. That is, the spam filtering unit 420 and the legitimate message input unit 410 may not be physically separated, and the same database may be used together.

Thereafter, when the calling terminal 100 creates a short message, the short message is transmitted to the short message center 300 through the mobile communication network 200 (S530 and S535).

Thereafter, the subscriber server checks whether the recipient of the message, that is, the owner of the called terminal, has subscribed to the spam blocking service (S540).

When it is confirmed that the called party subscribes to the spam blocking service, the spam determination information is extracted from the short message (S545). The spam determination information here may be the short message itself, or may be a calling number, a reply number, a short message content, or a CallbackURL address embedded in the short message. Hereinafter, for convenience of explanation, assume a reply number and a short message.

The extracted spam determination information is transmitted to the spam filtering unit 420 in the spam filtering server 400 (S550).

The spam filtering unit 420 compares the received spam determination information with pre-stored legal message information to determine whether the message is a legal message (S560). That is, if there is information that matches the account number and short message included in the spam judgment information, it is searched among pre-stored legal message information, and if there is matched information, it is judged as a legal message, and if not, it is not a legal message.

If it is not a legitimate message, after performing a general spam filtering step (S570), and transmits the determination result to the SMS center (S580), the SMS center 300 according to the determination result to the destination terminal through the mobile communication network Transfer (S590, S595).

4 is a flowchart illustrating a spam message processing method according to an embodiment of the present invention.

First, the SMS center 300 receives an SMS from the calling terminal (S610).

Thereafter, the SMS center 300 checks with the subscriber server whether the recipient of the message, that is, the receiver of the called terminal, has subscribed to the spam blocking service (S620).

If you do not subscribe to the spam blocking service (S620-N), it immediately sends an SMS to the called terminal (S690).

On the contrary, when it is confirmed that the called party subscribes to the spam blocking service (S620-Y), the spam determination information including the reply number and the message content is extracted from the SMS (S630).

The extracted spam determination information is transmitted to the spam filtering server 400 (S635).

The spam filtering server 400 determines whether the spam determination information is included in previously stored message information (S640).

If it is included (S650-Y), the SMS corresponds to the SMS sent after the authentication terminal is stored as a legitimate message in advance, and immediately sends the SMS to the called terminal without the process of spam filtering (S690).

If not included (S650-N), the spam filtering process is performed (S660). That is, it is determined whether or not it is spam through a search of a keyword and a sender blacklist based on the reply number and the message content included in the spam determination information.

If the determination result is not spam (S670-N), the SMS is transmitted to the called terminal (S690), and if it corresponds to spam (S670-Y), SMS blocking is performed (S680).

So far, a spam filtering system and a spam filtering method using the same for preventing the filtering of legitimate messages have been described.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

The spam filtering system and the spam filtering method using the same to prevent the filtering of legitimate short messages according to the present invention have been unintentionally blocked despite being a message that must be sent to customers by filtering spam in advance in a mobile communication network. In order to prevent the problem, the conventional spam filtering techniques are simple filtering techniques, whereas this technique is a series of techniques for pre-filtering messages that do not require a filtering step before filtering. It is an invention that has industrial applicability because not only the possibility of marketing or sales to the applied mobile communication system and the terminal device is sufficient, but also the degree that can be clearly realized in reality.

1 is a schematic block diagram showing a spam filtering system according to the present invention;

2 is a block diagram of a spam filtering server according to an embodiment of the present invention;

3 is a flowchart illustrating a spam message processing method according to an embodiment of the present invention;

4 is a flowchart illustrating a spam message processing method according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: calling terminal 110: called terminal

200: mobile communication network 300: short message center

310: subscriber server 400: spam filtering server

410: legal message input unit 420: spam filtering unit

Claims (16)

A message center for extracting spam determination information from the message after receiving the message and delivering the spam determination information to a spam filtering server; And It is determined whether the message is a legitimate message based on the spam judgment information. If the legitimate message determination step indicates that the message is a legitimate message, the message is transmitted to the message center immediately, and the message is a legitimate message. If not the spam filtering system characterized in that it comprises a spam filtering server for transmitting whether or not the spam character to the message center based on the result after the spam filtering process for the message. The method of claim 1, The message center After receiving the message, the subscriber server inquires whether or not the called party, the owner of the called terminal subscribed to the spam blocking service, and if it is confirmed from the subscriber server that the called party subscribed to the spam blocking service, the spam determination information Spam filtering system, characterized in that to deliver to the spam filtering server. The method of claim 1, The message center The spam filtering system, when receiving the information that is not a spam text from the spam filtering server, the message is sent to the called terminal, and when receiving the information called spam text spam filtering system, characterized in that blocking the message. After receiving the spam determination information corresponding to the message sent to the called terminal, it is determined whether the message is a legitimate message based on the spam determination information, If the message is a legitimate message, it transmits information indicating that the message is not spam, and if the message is not a legitimate message, performs a spam filtering process on the message and transmits whether the message is spam. Spam filtering server, characterized in that. The method of claim 4 The spam filtering server A function of receiving and storing legal message information from an input terminal, Spam filtering server, characterized in that for determining whether the message is a legitimate message based on a comparison result of the spam determination information and the pre-stored legal message information. The method of claim 5 The spam filtering server A legal message input unit for receiving and storing legal message information from the input terminal; And Receiving and storing the stored legal message information from the legal message input unit, comparing the spam determination information with the previously stored legal message information, and determining whether the message is a legal message, If the message is a legitimate message, it transmits information indicating that the message is not spam, and if the message is not a legitimate message, performs a spam filtering process on the message and transmits whether the message is spam. Spam filtering server comprising a spam filtering unit. The method of claim 6 The legal message input unit An authenticator configured to determine whether the input terminal is an authenticated terminal; A legal message temporary DB for storing the received legal message information; And And an uploading unit which transmits the legitimate message information to the spam filtering unit at a predetermined time. The spam filtering unit A legal message DB for storing legal message information transmitted from the legal message input unit; And Spam filtering server comprising a spam determination unit for comparing the legitimate message information included in the legitimate message DB and the spam determination information and whether the message is a legitimate message and a spam filtering process for the message. The method of claim 7, The legal message input unit Spam filtering server further comprises a legitimate message verification unit for verifying and managing the legitimate message information stored in the legitimate message temporary DB. The method of claim 4, wherein The spam judgment information is characterized in that it includes any number of the calling number, the reply number extracted from the message and the content of the short message, The legal message information may include any one of a calling number and a reply number received from the input terminal and the content of a short message. The spam filtering server If the same data as the spam determination information is included in the legitimate message information, it is determined to be a legitimate message, and if the same data as the spam determination information is not included in the legitimate message information, it is determined to be not a legal message. Spam filtering server, characterized in that. A spam determination information extraction step of extracting spam determination information from the message after the message center receives the message transmitted to the called terminal; Spam determination information delivery step of the message center delivers the spam determination information to a spam filtering server; Determining, by the spam filtering server, whether the message is a legitimate message based on the spam determination information; And As a result of the legitimate message determination step, if the message is a legitimate message, information that is not a spam text is transmitted to a message center, And if the message is not a legitimate message, after performing a spam filtering process on the message, determining whether or not the spam message is transmitted to a message center based on the result of the spam filtering. . The method of claim 10 The spam filtering server further includes a legitimate message input step of receiving and storing legitimate message information from an input terminal. The legitimate message determination step may include determining whether the legitimate message is a legitimate message based on a result of comparing the spam determination information with the previously stored legitimate message information. The method of claim 11, The spam judgment information is characterized in that it includes any number of the calling number, the reply number extracted from the message and the content of the short message, The legal message information is It characterized in that it comprises any number of the calling number, the reply number received from the input terminal and the content of the short message, The legal message determination step When the same data as the spam determination information is included in the legal message information, it is determined to be a legitimate message, and when the same data as the spam determination information is not included in the legal message information, it is determined that it is not a legal message. Spam filtering method, characterized in that. The method of claim 11, And an input terminal authentication step of determining whether the input terminal is an authenticated terminal, The legitimate message input step Spam filtering method characterized in that is performed only when the input terminal is authenticated. The method of claim 11, Spam filtering method further comprises the step of verifying the legal message information for determining the pre-stored legal message information. The method of claim 10 The message center further includes a message processing step of transmitting the message to the called terminal when the message center receives the non-spam text from the spam filtering system and blocking the message when receiving the information called the spam text. Spam filtering method characterized in that. The method of claim 10 After the message center receives the message, and further comprising the blocking service subscription decision step of inquiring the subscriber server whether the called party, the owner of the called terminal subscribed to the spam blocking service, The spam determination information extracting step is performed when the receiver determines that the called party subscribes to the spam blocking service as a result of the subscription determining step.

Images