KR20080109118A - Fingerprint information authentication method using smart card and system - Google Patents

Abstract

The present invention provides a fingerprint information authentication method and system using a smart card that can secure the reliability and accuracy (reliability) for fingerprint information authentication by using two reference values that are guidelines for determining user authentication and re-authentication. It is about.

The present invention provides a fingerprint information authentication method using a smart card in which reference feature information extracted from a user's fingerprint is stored, the method comprising: (a) extracting feature information of a predetermined fingerprint from a fingerprint authentication requester; (b) calculating the similarity between the feature information extracted from the fingerprint authentication requester and the reference feature information stored in the smart card; (c) comparing the calculated similarity with the first reference value, which is a criterion for user unauthorized authentication, and the second reference value, which is a criterion for user authentication; And (d) determining whether the user is authenticated using the comparison result.

Description

Fingerprint information authentication method using smart card and its system {Method for certificating fingerprint information using smart card, and system therefor}

1 is a schematic diagram of a fingerprint information authentication system according to a preferred embodiment of the present invention;

2 is a flowchart illustrating a fingerprint information authentication method of a fingerprint information authentication system according to an embodiment of the present invention;

3 is a schematic diagram of a fingerprint information authentication system according to another preferred embodiment of the present invention;

4 is a flowchart illustrating a fingerprint information authentication method of a fingerprint information authentication system according to another preferred embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

100: first fingerprint information authentication system 110: fingerprint information reading unit

120: fingerprint information processing unit 130: smart card reader unit

140: first smart card 142: memory unit

144: similarity determination unit 146: authentication unit

148: first control unit 150: first communication unit

300: second fingerprint information authentication system 320: fingerprint information authentication unit

322: fingerprint feature information generation unit 324: second communication unit

326: power supply unit 328: second control unit

340: second smart card

The present invention relates to a fingerprint information authentication method using a smart card and a system thereof. More specifically, the fingerprint information authentication method using a smart card that can secure the reliability and accuracy (reliability) for fingerprint information authentication by using two reference values that are guidelines for determining user authentication and re-authentication, and its It's about the system.

In general, a smart card refers to an electronic card that provides a memory function and command processing function by mounting an IC memory device. Such smart cards have recently been in the spotlight because they do not expose personal information (for example, credit card or account information) to the outside, thereby contributing to preventing forgery of personal information. Such a smart card realizes the above according to the following.

Smart cards provide security blocks that give different secret codes to card makers, card issuers, service providers, cardholders, etc., so that they can access different parts of memory. to provide. A security block consists of a secret code and a secret code descriptor. Here, the secret code descriptor functions to define access conditions for initializing the smart card, encrypting or limiting the secret code, the number of commands associated with the secret code, and the like. The smart card controls the access of the files provided in the directory by using the security block provided for each directory.

Such a smart card provides a secret code as a mechanism for authenticating that the card holder is a legitimate user, and this secret code is called a PIN (Personal Identification Number). The PIN refers to a method of authenticating a user by comparing a value stored in the card with the card holder after inserting the card into the card reader and entering a 4-digit or 6-digit number. Such a PIN lacks the number of cases for extracting an authentication key and thus lacks security. In addition, the PIN has a problem that anyone can easily authenticate when the authentication key is exposed to the outside by others, so that security is violated.

In order to solve this problem, the use of bio information such as fingerprint information, which is personal information, is increasing in authenticating smart cards. In the above description, the fingerprint information is information on a user's fingerprint that enables the user to be distinguished from others. Unlike the conventional key input, such fingerprint information has an advantage of securing information security during the input process because others cannot grasp the input contents with the naked eye.

However, conventional smart card authentication using fingerprint information has exposed the following problems. First, since there is only one fingerprint information required for authentication, the conventional authentication device only obtains one fingerprint information from the user. In this case, it is highly likely to be inaccurate (i.e., an error of recognizing another person as a user) to authenticate the user with the acquired fingerprint information, and may be an opportunity to distrust fingerprint information authentication.

Second, the smart card is generally classified into a match-on-card (MOC) and a store-on-card (SOC) according to where the authentication device is provided. The SOC is provided with an authentication device in an external terminal (specifically, a smart card reader device or a computer or server connected thereto), whereas the MOC is provided with an authentication device in a smart card. Considering the security aspect, MOC is getting more attention because it is safe because it does not expose the user's fingerprint information to the outside. However, in case of MOC, fingerprint recognition processing at the level of an external terminal is impossible due to the limitation of arithmetic function and memory of smart card. This may cause a problem of deterioration of recognition performance by increasing the possibility of error recognition of others as a user.

The present invention has been made to solve the above problems, fingerprint information authentication method using a smart card, characterized in that for performing the user authentication using two reference values that are guidelines for determining whether to authenticate and re-authentication; The purpose is to provide the system.

In addition, an object of the present invention is to provide a fingerprint information authentication method and system using a smart card, characterized in that for performing user authentication using a plurality of fingerprint information.

The present invention has been made to achieve the above object, in the fingerprint information authentication method using a smart card that stores the reference feature information extracted from the user's fingerprint, (a) feature information for a predetermined fingerprint from the fingerprint authentication requester Extracting; (b) calculating a similarity degree between the feature information extracted from the fingerprint authentication requester and the reference feature information stored in the smart card; (c) comparing the calculated similarity with the first reference value, which is a criterion for user unauthorized authentication, and the second reference value, which is a criterion for user authentication; And (d) determining whether to authenticate a user using the comparison result.

The present invention also provides a fingerprint information authentication system including a smart card storing reference feature information extracted from a user's fingerprint, the fingerprint information reading unit configured to read image information of a specific fingerprint from a fingerprint authentication requester; A fingerprint information processing unit for extracting feature information on a predetermined fingerprint from the image information; And calculating a similarity between the extracted feature information and the stored reference feature information, and comparing the calculated similarity with the first reference value serving as a criterion for user authentication and the second reference value serving as a criterion for user authentication. It provides a fingerprint information authentication system comprising a smart card for determining whether or not to authenticate the user.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the following will describe a preferred embodiment of the present invention, but the technical idea of the present invention is not limited thereto, but may be variously modified and implemented by those skilled in the art.

1 is a schematic diagram of a fingerprint information authentication system according to a preferred embodiment of the present invention. As shown in FIG. 1, the first fingerprint information authentication system 100 according to a preferred embodiment of the present invention includes a fingerprint information reader 110, a fingerprint information processor 120, and a smart card reader 130. And a first smart card 140.

The first fingerprint information authentication system 100 performs user authentication using the first smart card 140 which is a MOC type smart card. The first fingerprint information authentication system 100 executes user authentication using a single fingerprint information, but if it is not sure whether the fingerprint information is the user's user, request the fingerprint information of another finger for user authentication. It is characterized by executing.

The fingerprint information reader 110 performs a function of reading fingerprint information from an authentication requestor in an embodiment of the present invention. Thereafter, the fingerprint information reading unit 110 transmits the acquired fingerprint information to the fingerprint information processing unit 120. Then, the fingerprint information processing unit 120 processes it and delivers it to the smart card reader unit 130. Of course, in the exemplary embodiment of the present invention, the fingerprint information reader 110 may process the acquired fingerprint information and directly deliver the fingerprint information to the smart card reader 130. In the meantime, since the fingerprint information has been described above, detailed description thereof will be omitted.

The fingerprint information processing unit 120 performs a function of processing fingerprint information as described above in the embodiment of the present invention. Such processing usually extracts feature information from the fingerprint of the authentication requestor through image preprocessing, feature point extraction, template generation, etc. (here, the feature information is generated from the user's fingerprint and distinguished from the standard feature information previously stored. In the following description, it is referred to as extraction feature information). Such processing can be taken into consideration, for example, as proposed in Korean Patent Registration Publication No. 629,302, "Method for Generating Fingerprint Template for Fingerprint Registration." However, when the extracted feature points are many, the authentication efficiency is improved, but the processing time is delayed (particularly, when the smart card performs the authentication function, this phenomenon is further exacerbated). It is preferable to adjust the number of.

In addition, the fingerprint information processing unit 120 performs a function of executing a specified job based on the result of the authentication by the first smart card 140. For example, the fingerprint information processing unit 120 performs a function of opening the closed door if the result is user authentication. On the other hand, the fingerprint information processing unit 120 performs a function of sending a warning message to the person who wants to open the door if the result is user authentication.

The fingerprint information processing unit 120 may be implemented as a general server or a computer, but is not limited thereto. That is, the fingerprint information processing unit 120 may be implemented as any device as long as the device has a microprocessor and performs a control function to execute the above function.

The smart card reader 130 performs a function of developing mutual communication with the fingerprint information reader 110, the fingerprint information processor 120, and the first smart card 140 in the embodiment of the present invention. Specifically, the smart card reader 130 performs a function of transferring the fingerprint information to the first smart card 140 when the fingerprint information is transmitted from the fingerprint information reader 110 or the fingerprint information processor 120. In addition, when the smart card reader unit 130 receives the authentication result of the first smart card 140, the smart card reader unit 130 transmits the smart card reader unit 130 to the fingerprint information processing unit 120.

As already mentioned in the embodiment of the present invention, the first smart card 140 stores the fingerprint information of the plurality of users in the MOC type. The first smart card 140 performs a function of comparing and authenticating the fingerprint information of the authentication requestor acquired by the fingerprint information reader 110 with the stored fingerprint information of the user. The detailed configuration of the first smart card 140 may be referred to, for example, the Republic of Korea Patent Publication No. 2003-61092 "Smart card system including biometric information recognition and authentication device and its authentication method". The first smart card 140 will be described in detail how to perform the authentication function as follows.

First, the first smart card 140 obtains fingerprint information from the user when it is issued to the user and stores it in the memory unit 142. Of course, the fingerprint information of the user may be stored in the smart card at the request of the user after issuance. In this case, however, only the fingerprint information (specifically, reference feature information) of the user is not stored in the smart card. That is, the similarity comparison value of the fingerprint information is also stored in the memory unit 142. The process of registering the fingerprint information and the similarity comparison value of the user in the first smart card 140 is as follows.

When the fingerprint is registered, the user inputs the fingerprint of the same finger to the registration device a plurality of times. Then, the registration apparatus registers the fingerprint of the user by combining the most excellent or input fingerprints among the input fingerprints. Of course, the value stored in the smart card is reference feature information extracted from the user's fingerprint, that is, the user's fingerprint information. Such a process can be taken into consideration, for example, in Korean Patent Laid-Open Publication No. 2006-47410, "Method for registering a fingerprint authentication system, a fingerprint authentication system and a recording medium recording the program".

Meanwhile, the registration apparatus compares the plurality of input fingerprints with each other and extracts a similarity comparison value therefrom. The similarity comparison value may be an average value between the plurality of fingerprint information, but is not limited thereto. For example, the similarity comparison value may be a mean value, a standard deviation, or a sum of significance levels. At this time, the significance level may be arbitrarily adjusted in consideration of the security level.

Thereafter, the registration apparatus stores the similarity comparison value in the smart card. The similarity comparison value may vary depending on the fingerprint state or input method of each individual, the sharpness of fingerprint information, and the number of feature points.

When the first smart card 140 receives the fingerprint information (extracting feature information) of the authentication requestor from the smart card reader unit 130, the first smart card 140 performs a process of comparing and authenticating the fingerprint information with the comparison target fingerprint information. The comparison authentication is performed by calculating the similarity between the fingerprint information of the authentication requestor and the fingerprint information of the user. Then, the similarity calculation value is determined based on a predetermined threshold value to derive the authentication result. The reference value is divided into the highest value and the lowest value. The lowest value is a reference value that is not clearly recognized by the supplicant as a user (for example, a False Acceptance Rate (FAR) and a False Rejection Rate (FRR), such as EER (Equal Error Rate)). , The highest value is the reference value that explicitly recognizes the authentication requester as a user (i.e., Zero Match Rate (Frozen Match Rate), where the acceptance rate is zero). In the present invention, the minimum and maximum reference values may be set for each fingerprint based on the similarity stored during registration. The reference value may be predetermined in this way, but may be adjusted accordingly in consideration of the significance level. The reference value is determined as a percentage value between 0% and 100% or a real value between 0 and 1. Referring to the comparative authentication in more detail as described above are as follows.

The similarity determining unit 144 of the first smart card 140 compares fingerprint information of the authentication requestor with fingerprint information of the user and calculates similarity. Here, the similarity calculated may be determined as a percentage value between 0% and 100% or a real value between 0 and 1, similarly to the reference value. Thereafter, the authentication unit 146 of the first smart card 140 determines whether the calculated similarity corresponds to which range (1) is less than the minimum value, (2) is between the minimum and maximum values, and (3) is greater than the maximum value). To derive the results.

In addition, referring to the following process, the fingerprint information processing unit 120 authenticates the user of the authentication requestor based on the authentication result when the degree of similarity corresponds to ①. After that, a warning message is output. Of course, in this case, the fingerprint information processing unit 120 may also request input of other fingerprint information from the authentication requestor. The fingerprint information processing unit 120 requests additional input of other fingerprint information to the authentication requestor when the similarity corresponds to ②. The fingerprint information processing unit 120 authenticates the user of the authentication requestor when the similarity corresponds to ③.

Since the authentication requester additionally inputs fingerprint information and the first smart card 140 authenticates the fingerprint information, it can be easily invented by those skilled in the art based on the above description, and thus the description thereof will be omitted below. In this case, however, even if the authentication result value corresponds to ②, the fingerprint information processing unit 120 may make a user authentication or non-authentication decision without requesting additional information.

On the other hand, in the embodiment of the present invention it is also possible to proceed with the first smart card 140 as the subject instead of the fingerprint information processing unit 120 described above.

On the other hand, in the first smart card 140, the first control unit 148 functions to control the operation of each unit constituting the first smart card 140, the first communication unit 150 communicates with an external terminal. Of course it does.

Next, a fingerprint information authentication method of a fingerprint information authentication system according to a preferred embodiment of the present invention configured as described above will be described. Since the functions performed by the parts 110 to 148 constituting the fingerprint information authentication system have been described in detail above with reference to FIG. 1, only the general contents thereof will be described. 2 is a flowchart illustrating a fingerprint information authentication method of a fingerprint information authentication system according to an exemplary embodiment of the present invention.

Referring to FIG. 2, first, an authentication requester inputs fingerprint information into the fingerprint information reading unit 110 for user authentication. That is, the fingerprint information reading unit 110 collects a fingerprint from the authentication requestor (S200). Thereafter, the fingerprint information reading unit 110 transmits the acquired fingerprint information to the fingerprint information processing unit 120 (s202). The fingerprint information processing unit 120 processes the fingerprint information (S210) and transmits the generated fingerprint information to the first smart card 140 through the smart card reader unit 130 (S212).

The similarity determination unit 144 of the first smart card 140 compares the fingerprint information with the fingerprint information stored in the memory unit 142 and calculates the similarity (S220). Thereafter, the authentication unit 146 derives the authentication result, and the first communication unit 150 transmits the authentication result to the fingerprint information processing unit 120 through the smart card reader unit 130 (S222). The fingerprint information processing unit 120 determines one of 'user non-authentication', 'additional request of fingerprint information', and 'user authentication' based on the authentication result (S230). In addition, the fingerprint information processing unit 120 performs a function appropriate to the matter determined in connection with the other device (s232). An example is as follows.

Ⓐ If the determined item is 'User Unauthorized': A warning message is sent.

Ⓑ If the decision is 'user authentication': The door lock device opens the locked door.

Ⓒ If the determined item is 'addition request of fingerprint information': Repeat step s200 to step s234. However, when the added fingerprint information is also set in the 'add request of fingerprint information', the fingerprint information processing unit 120 may arbitrarily determine any one of 'user unauthentication' and 'user authentication'.

On the other hand, as described above, it is also possible to proceed with the first smart card 140 as a subject after deriving the authentication result.

Next, a fingerprint information authentication system and a fingerprint information authentication method according to another preferred embodiment of the present invention will be described. First, the fingerprint information authentication system will be described. 3 is a schematic diagram of a fingerprint information authentication system according to another preferred embodiment of the present invention. As shown in FIG. 3, the second fingerprint information authentication system 300 according to another preferred embodiment of the present invention includes a fingerprint information reader 110, a fingerprint information authentication unit 320, and a smart card reader unit ( 130 and the second smart card 340.

The second fingerprint information authentication system 300 performs user authentication using the second smart card 340 which is an SOC type smart card. Therefore, in the second fingerprint information authentication system 300, the fingerprint information authentication unit 320 performs an authentication function. Accordingly, it can be seen that the similarity determining unit 144 and the authentication unit 146 provided in the first smart card 140 are provided in the fingerprint information authentication unit 320. Since the fingerprint information authentication unit 320 performs the authentication function with reference to the above description with reference to FIG. 1, the detailed description thereof will be omitted. However, the fingerprint information to be compared is stored in the second smart card 340, so it should be noted that the fingerprint information authentication unit 320 needs to receive a process from the second smart card 340.

In addition, there is one more difference that the second fingerprint information authentication system 300 has to the first fingerprint information authentication system 100. This means that the fingerprint information reading unit 110 receives a plurality of fingerprint information from the authentication requester. The reason for this is that the fingerprint information authenticator 320 can realize the limitation of the calculation function and the memory. On the other hand, in this case, the fingerprint information authentication unit 320 may immediately make a final decision of 'user non-authentication' or 'user authentication' without 'additional request of fingerprint information' based on the plurality of fingerprint information. Of course, in this case, it is also possible for the fingerprint information authentication unit 320 to make a final decision of 'additional request of fingerprint information'.

On the other hand, based on the above, the fingerprint information authentication unit 320 is fingerprint feature information generation unit 322, similarity determination unit 144, authentication unit 146 for generating extracted feature information from the fingerprint of the authentication requestor ), A second communication unit 324 for communicating with an external device, a power supply unit 326 for supplying power to the respective parts constituting the fingerprint information authentication unit 320, and a second control unit 328 for controlling the overall operation of the units. ) May be easily implemented by those skilled in the art.

Next, the fingerprint information authentication method will be described. 4 is a flowchart illustrating a fingerprint information authentication method of a fingerprint information authentication system according to another preferred embodiment of the present invention.

Referring to FIG. 4, the fingerprint information reading unit 110 collects a plurality of fingerprints from an authentication requestor (S400). In this case, the plurality of fingerprints are collected through different fingers. Thereafter, the fingerprint information reading unit 110 transmits the obtained plurality of fingerprint information to the fingerprint information authenticating unit 320 (S402). The fingerprint feature information generation unit 322 of the fingerprint information authentication unit 320 processes the plurality of fingerprint information (s410), and at the same time, the second control unit 328 uses the second smart card through the smart card reader unit 130. The fingerprint information of the user stored in 340 is requested (S412). When receiving the request signal, the second smart card 340 transmits the stored fingerprint information to the fingerprint information authenticator 320 through the smart card reader 130 (S420).

Thereafter, the similarity determination unit 144 of the fingerprint information authentication unit 320 compares the generated fingerprint information with the received fingerprint information and calculates the similarity (S430). Thereafter, the authentication unit 146 derives an authentication result and derives a final decision of 'user non-authentication' or 'user authentication' based on this (S432). In this case, the authentication unit 146 may include only one reference value and determine 'user authentication' if the value is greater than or equal to the user's value and 'user non-authentication' if the value is less than the value. The second controller 328 interoperates with another device to perform a function appropriate for the final decision (s434).

On the other hand, in the present invention, the configuration and method according to the second embodiment of the configuration and method (see Figs. 1 and 2) according to the first embodiment under the assumption that the first smart card 140 overcomes the limitations of the calculation function and the memory The method (see FIGS. 3 and 4) can be applied. Similarly, it is also possible to reflect the configuration and the method according to the first embodiment in the configuration and the method according to the second embodiment.

The above description is merely illustrative of the technical spirit of the present invention, and those skilled in the art to which the present invention pertains various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

The present invention generates the following effects through user authentication using two reference values, which are guidelines for determining whether to authenticate or re-authenticate, and user authentication using multiple fingerprint information. Let's do it.

First, the use of fingerprint information related to personal property protection and privacy needs to bring the FAR to zero. The present invention can be realized so that illegal theft of fingerprint information can be prevented.

Second, the present invention can prevent the error of recognizing the other person as a user.

Third, the present invention enables to secure the reliability and accuracy (reliability) for fingerprint information authentication.

Claims (12)

In the fingerprint information authentication method using a smart card that stores the reference feature information extracted from the user's fingerprint, (a) extracting feature information on a predetermined fingerprint from a fingerprint authentication requester; (b) calculating a similarity degree between the feature information extracted from the fingerprint authentication requester and the reference feature information stored in the smart card; (c) comparing the calculated similarity with the first reference value, which is a criterion for user unauthorized authentication, and the second reference value, which is a criterion for user authentication; And (d) determining whether to authenticate a user using the comparison result Fingerprint information authentication method comprising a. The method of claim 1, The reference feature information stored in the smart card is feature information about a plurality of fingerprints extracted from two or more different fingers, and the calculated similarity is obtained from the first reference value and the first reference value as a result of the comparison in step (c). If the value is between 2 reference values, (a1) extracting feature information on another fingerprint from the fingerprint authentication requester, and repeating steps (b) and (c) based on the other fingerprint; The step (d) is a fingerprint information authentication method comprising the step of determining whether or not to use the user authentication using the comparison result of the repeated step (a1). The method of claim 2, In step (d), the fingerprint authentication requester is not authenticated when the similarity calculated through the step (c) or the step (a1) is less than the first reference value, and the fingerprint authentication is performed when the second reference value is exceeded. Fingerprint information authentication method characterized in that for authenticating the requestor user. The method of claim 1, The first reference value and the second reference value may use a similarity value between a plurality of fingerprint feature information on the same finger, or in a group consisting of EER (Equal Error Rate), False Acceptance Rate (FAR), and False Rejection Rate (FRR). Fingerprint information authentication method characterized in that determined by using one or more values selected. The method of claim 1, As a previous step of step (a), (a2) storing a similarity comparison value obtained by comparing a plurality of fingerprints when registering a fingerprint of the user in the smart card; Fingerprint information authentication method comprising a. The method according to any one of claims 1 to 5, (B) to (d) are fingerprint information authentication method, characterized in that performed in the smart card. In the fingerprint information authentication system including a smart card storing the standard feature information extracted from the user's fingerprint, A fingerprint information reading unit for reading image information of a specific fingerprint from a fingerprint authentication requester; A fingerprint information processing unit for extracting feature information on a predetermined fingerprint from the image information; And Comparing the degree of similarity between the extracted feature information and the stored reference feature information, and compares the calculated similarity with the first reference value, which is a criterion for user authentication, and the second reference value, which is a criterion for user authentication, and the comparison result. Smart card to determine user authentication Fingerprint information authentication system comprising a. The method of claim 7, wherein The smart card, A memory unit for storing similarity comparison values obtained by comparing a plurality of fingerprints when registering the reference feature information and the fingerprint of the user; A similarity determination unit calculating a similarity between the reference feature information and the feature information; And An authentication unit for deriving an authentication result by comparing the first reference value and the second reference value, and the calculated similarity derived from the similarity comparison value Fingerprint information authentication system comprising a. The method according to claim 7 or 8, The reference characteristic information stored in the smart card is characteristic information of a plurality of fingerprints extracted from two or more different fingers. When the calculated similarity is a value between the first reference value and the second reference value, the smart card generates a control signal for requesting a fingerprint re-input to the user in order to extract feature information about another fingerprint from the user. Fingerprint information authentication system. The method of claim 9, The smart card authenticates a user of the fingerprint authentication requestor when the calculated similarity is less than the first reference value, and authenticates the user of the fingerprint authentication requestor when the second reference value is exceeded. The method of claim 7, wherein The first reference value and the second reference value used for comparison in the smart card may use a similarity value between a plurality of fingerprint feature information for the same finger, or use an equal error rate (EER), false acceptance rate (FAR), and false (FRR). Rejection Rate) fingerprint information authentication system, characterized in that determined using one or more values selected from the group consisting of. The method of claim 7, wherein The fingerprint information processing unit, the fingerprint information authentication system, characterized in that for adjusting the number of feature points of the fingerprint in consideration of the processing time.

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