JPH11144059A - Fingerprint registration system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fingerprint registration system which can hold the secrecy of fingerprint data of a fingerprint collating system in which a fingerprint sensor is incorporated. SOLUTION: The fingerprint registration system codes a fingerprint pattern detected by a fingerprint sensor device by a coding means 302, ciphers the coded pattern by a ciphering means 303, and records the ciphered pattern by a recording means 304. Thus, the fingerprint code is ciphered, so the fingerprint collating system can be used without letting a 3rd person know an individual fingerprint code.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a fingerprint registration system which constitutes a fingerprint collating system incorporating a fingerprint sensor, and relates to a technique effective for using a fingerprint code.

[0002]

2. Description of the Related Art Conventionally, there has been known a fingerprint collation system for detecting fingerprint data and performing personal identification based on the fingerprint data. In this type of fingerprint collation system, a fingerprint pattern of an individual detected by a fingerprint sensor is coded to obtain a fingerprint code, and this fingerprint code is compared with a fingerprint code of the individual registered in advance, and if both match, If it is determined to be the person himself.

When such a fingerprint collation system is used in the range of an individual, for example, for opening or closing a key of a private house or opening / closing a door of a privately owned car, it is unlikely that personal fingerprint data is leaked to another person. Not generally.

[0004]

However, when the fingerprint collation system is used as personal identification means such as a credit card or electronic money, the personal fingerprint data is stored in the IC card or in a credit card company or electronic money. Is recorded inside a computer installed at a business partner or the like.

[0005] For this reason, it is conceivable that a credit card company, a business partner of electronic money, or the like may know personal fingerprint data, which is important privacy, via an IC card or a computer. This can be a major obstacle to the spread of fingerprint matching systems.

In addition, since the above-mentioned credit card companies and the like handle a large number of personal fingerprint data via a computer for personal identification, there is a concern that personal fingerprint data may leak from the credit card companies and the like. It is.

[0007] The present invention has been made in view of the above points, and a fingerprint registration system capable of maintaining the security of fingerprint data in a fingerprint collation system incorporating a fingerprint sensor and allowing the system to be widely spread. The task is to provide.

[0008]

The present invention employs the following configuration to solve the above-mentioned problems. That is, according to the first aspect of the present invention, there is provided a fingerprint sensor for detecting a fingerprint pattern, coding means for coding the fingerprint pattern detected by the fingerprint sensor, and encryption of the fingerprint code coded by the coding means. And a recording means for recording the fingerprint code encrypted by the encryption means.

According to the first aspect of the invention, the fingerprint pattern detected by the fingerprint sensor is encoded by the encoding means, encrypted by the encryption means, and recorded by the recording means. Therefore, it is possible to use the fingerprint collation system without disclosing an individual's fingerprint code to others.

Here, the fingerprint sensor may be a sensor based on any principle as long as a fingerprint pattern can be obtained. In particular, Japanese Patent Laid-Open No. Hei 6-288845 (Japanese Patent No. 2030)
No. 279) is preferably used.

[0011] Also, encoding a fingerprint pattern means
For example, it means that a plurality of feature points called minutiae points are extracted from a fingerprint pattern read by a fingerprint sensor, and the relative position of each feature point is digitized.

Encrypting a fingerprint code means, for example, multiplying a coded fingerprint pattern by a predetermined determinant or the like. At this time, in order to obtain the original fingerprint code from the encrypted fingerprint code, the encrypted code may be multiplied by a predetermined inverse determinant.

The encoding means and the encryption means are CP
It can be realized as a function by the U (MPU) executing the program. The recording means can be composed of, for example, a RAM, a floppy disk, a hard disk, a magneto-optical disk, and the like.

According to a second aspect of the present invention, the encryption means according to the first aspect specifies the fingerprint code by encrypting the fingerprint code using a predetermined personal code as an encryption key. According to the invention of claim 2, by encrypting the fingerprint code using the personal code as the encryption key, it is possible to make the fingerprint code more difficult to decrypt as compared with the case where the fingerprint code is encrypted by multiplying by a determinant, for example. .

Here, as the encryption using the personal code, for example, a fingerprint code is generated as 64-bit ciphertext data, and the personal code is converted into an 8-bit numerical 4-digit (64-bit) encryption key (key block). ) And DES (Data Encrypt
Preferably, the fingerprint code is encrypted using an ion standerd encryption method. In addition, the personal code may be configured to be input from outside the fingerprint registration system, for example, or the encryption unit may read the personal code stored in a storage device such as a RAM or a ROM in advance. You may.

According to a third aspect of the present invention, there is provided the fingerprint registration system according to the first aspect, wherein the fingerprint key recording means records a fingerprint code of another finger of the same person different from the finger whose fingerprint code is generated by the encoding means. Furthermore, when the encrypting means generates a fingerprint code by the encoding means,
The fingerprint code of the other finger recorded in the encryption key recording means is specified by encrypting the generated fingerprint code using the fingerprint code as an encryption key.

In the second aspect of the present invention, if a configuration is adopted in which a personal code is input from outside the fingerprint registration system, there is a risk that the personal code may be leaked when the personal code is input. Therefore, the invention of claim 3 is to provide an encryption key recording means in the fingerprint registration system to prevent the encryption key from being known to others. Here, the encryption key recording means can be constituted by, for example, a RAM or the like, like the recording means of the first aspect.

According to a fourth aspect of the present invention, there is provided a re-encrypting means for re-encrypting an encrypted code which is a fingerprint code encrypted by the encrypting means according to the second or third aspect. It is.

According to the fourth aspect of the present invention, by re-encrypting the encrypted code, when fingerprint information leaks from a third party other than the fingerprint owner, the fingerprint information is extracted from the leaked fingerprint information. You can make the code unbreakable.

According to a fifth aspect of the present invention, the re-encryption means according to the fourth aspect specifies the re-encryption of the encrypted code using a predetermined third party code as an encryption key. Here, for the re-encryption of the encrypted code, for example, the above-mentioned DES encryption method can be used.

According to a sixth aspect of the present invention, the fingerprint registration system according to the fifth aspect is further characterized in that the fingerprint registration system further includes third party code storage means for recording the third party code.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. [Overall Configuration of Fingerprint Registration System] FIG. 1 is an external configuration diagram of a fingerprint registration system according to an embodiment of the present invention. FIG.
In the fingerprint registration system, a pressure type fingerprint sensor (hereinafter, referred to as “fingerprint sensor”) 12 and an IC (Integrated C
an IC card 11 in which the IC card 11 is incorporated; a processing device 15; an IC card input adapter 16 into which the IC card 11 is inserted; a recording unit 17; ) 18,
And a computer 14 comprising a display (for example, CRT, LCD, etc.) 29.

[Structure of IC Card] FIG. 2 is a hardware block diagram of the IC card 11 shown in FIG. In FIG. 2, the IC card 11 is the fingerprint sensor 1 described above.
2 and an MPU (Micro Proceed
ssing Unit) 21 and RAM (Rundom Access Memory) 2
3 and an external connector 24.
Connected to each other.

Here, the fingerprint sensor 12 is disclosed in
No. 68704 (Japanese Patent No. 2557795) uses an active matrix type surface pressure input panel (hereinafter, referred to as “surface pressure input panel”) 100. FIG.
3 is a configuration diagram of the surface pressure input panel 100. FIG. 3, the surface pressure input panel 100 is configured as follows. That is, the surface pressure input panel 100 has the conductive film 1 on the lower surface.
02a having a flexible pressure sheet 102. Further, the surface pressure input panel 100 has the scanning electrodes 130 and 140 arranged in a matrix on the insulating substrate 110,
A circuit board 103 is formed by forming a thin film transistor 120 and a conductive contact plate 150 at each intersection of the scanning electrode lines 130 and 140. The conductive film 102 a of the pressure sheet 102 is stacked so as to be in contact with the conductive contact plate 150 of the circuit board 103. The gate and the drain of the thin film transistor 120 are connected to one and the other of the matrix scan electrode lines 130 and 140, respectively, and the source is connected to the conductive contact plate 150. The surface pressure input panel 100 detects a fingerprint pattern of a finger pressing the pressure sheet 102 by a detection circuit (not shown). The fingerprint sensor 12 may be of any type as long as a fingerprint pattern can be obtained.

The RAM 23 stores various programs executed by the MPU 21, various data used when the MPU 21 executes the programs, and the like. The RAM 23 is used as a work area of the MPU 21.

The MPU 21 executes a program stored in the RAM 23 to perform coding, encryption, identification number assignment, fingerprint data recording, and collation processing on the fingerprint pattern obtained by the fingerprint sensor 12. And so on. The external connector 24 includes an interface circuit and the like, and is used when connecting to the computer 14.

FIG. 4 is a hardware block diagram of the computer 14 shown in FIG. In FIG. 2, a computer 14 includes a recording unit 17.
, The input device 18, the display 29, and the processing device 1
5, a CPU 26, a RAM 28, a ROM 30 corresponding to
An IC card connector 27 corresponding to the C card input adapter 16 is configured to be connected to each other via a bus 31.

The IC card connector 27 is connected to the IC card 1
1 and connected to the external connector 24 (see FIG. 2) to control data input / output between the IC card 11 and the computer 14. The input device 18 is used by an operator of the computer 14 to input data. ROM
Reference numeral 30 stores programs executed by the CPU 26 and various data. The RAM 28 forms a work area for the CPU 26, and records processing results of the CPU 26. C
The PU 26 executes a process on data from the IC card 11. The recording unit 17 is, for example, a floppy disk.
It is configured using an (FD) drive, and performs write / read operations on the FD. The CPU 26 performs processing related to data from the IC card 11 by executing the program. The display 29 is a CPU
Images, characters, and the like based on the processing result of 26 are displayed.

[Function of Fingerprint Registration System] FIG.
FIG. 5 is a functional block diagram of the fingerprint registration system shown in FIGS. The IC card 11 shown in FIGS. 1 and 2 includes a fingerprint pressure input unit 301, a coding unit 302, an encryption unit 303, a fingerprint code recording unit 304, an input / output I / F unit 305, and an encryption key recording unit (personal 306).

The fingerprint pressure input unit 301 corresponds to the fingerprint sensor 12 shown in FIG. 2, reads a fingerprint pattern of a finger pressed against the fingerprint sensor 12, and supplies the fingerprint pattern to the coding unit 302. The coding unit 302 receives the fingerprint pattern from the fingerprint pressure input unit 301, extracts feature points from the fingerprint pattern,
Code the relative coordinate values. FIG.
It is explanatory drawing of the process by 02.

The coding unit 302 is provided with the fingerprint pressure input unit 30
1 receives the original image data of the fingerprint pattern (see FIG. 6A). Then, the coding unit 302 performs a leveling process on the original image data (see FIG. 6B). Subsequently, the coding unit 302 converts the original image data that has been subjected to the leveling processing into binary image data (see FIG. 6C). Then, the coding unit 302 performs a thinning process on the binarized image data (see FIG. 6D). The data obtained by this thinning process is called fingerprint data. Subsequently, the coding unit 302
Extracts a plurality of feature points called minutiae points from fingerprint data, and codes relative coordinate values of the extracted feature points (for example, a 64-bit code is generated). The data generated by this encoding process is called a fingerprint code. Then, coding section 302 gives the fingerprint code to encryption section 303. It should be noted that, in the case of the identity verification process using a fingerprint, the fingerprint code, that is, the relative coordinate value of the minutiae point is verified, and it is determined whether or not the user is the identity.

The encrypting unit 303 receives the fingerprint code from the encoding unit 302 and encrypts the fingerprint code by multiplying the fingerprint code by a predetermined determinant. Further, the encryption unit 303 encrypts the fingerprint code using the personal code input from the input device 18 or the encryption key recorded in the encryption key recording unit 306 according to the setting. The data obtained by the processing by the encryption unit 303 is called an encryption code. Then, the encryption unit 303 records the encryption code in the fingerprint code recording unit 304.

The fingerprint code recording unit 304 corresponds to the RAM 23 shown in FIG. 2, and holds the encryption code recorded by the encryption unit 303 as fingerprint data to be compared.
The input / output I / F unit 305 corresponds to the external connector 24 shown in FIG. 2, and outputs data held in the fingerprint code data recording unit 304 to the external computer 14, or outputs data from the computer 14. It functions as an interface unit when receiving.

The encryption key recording unit 306 stores the RA shown in FIG.
It corresponds to M23. The encryption key recording unit 306 holds a fingerprint code related to another finger of the fingerprint owner of the fingerprint code encrypted and recorded in the fingerprint code recording unit 304 as a personal code used as an encryption key. The encryption key stored in the encryption key recording unit 306 is used for processing of the encryption unit 303. The encryption key recording unit 306 is configured to hold a predetermined personal code of the fingerprint owner (for example, a 64-bit code of four digits) instead of the fingerprint code of the other finger described above. It may be.

In FIG. 5, the computer 14 shown in FIGS. 1 and 4 includes an input / output I / F unit 311, a fingerprint code recording unit data reading unit (hereinafter referred to as “data reading unit”) 312, and a re-encryption unit. It comprises a converting unit 313, a third-party fingerprint code recording unit 314, a code input unit 315, and a third-party code recording unit 316.

The input / output I / F unit 311 has the I / F shown in FIG.
It corresponds to the C card connector 27, and gives data in the computer 14 to the IC card 11. On the other hand, IC card 1
Receive data from 1.

The data reading unit 312 reads out the encrypted code recorded in the fingerprint code recording unit 304 in the IC card 11 and gives it to the re-encryption unit 313. Re-encryption unit 3
13 receives the encrypted code from the data reading unit 312 and re-encrypts the encrypted code by using the third-party code stored in the third-party code recording unit 316 as an encryption key. Generate code. This re-encrypted code is called a third-party fingerprint code. Note that the re-encryption unit 313 may be configured to acquire the fingerprint code generated by the encoding unit 302 from the IC card 11 and encrypt the fingerprint code.

The third-party fingerprint code recording unit 314 holds the processing result (third-party fingerprint code) by the re-encryption unit 313. Further, the third party code recording unit 316 stores the re-encryption unit 3
As an encryption key used in the process of No. 13, a code of a third party (for example, a credit card company, etc.)
A 3rd party code (a 4-bit code) is stored in advance.

The code input unit 315 corresponds to the input device 18 shown in FIGS. 1 and 4, and is used for inputting a personal code used for processing by the encryption unit 303. In the fingerprint code recording unit 317, an encrypted code read from the IC card 304 by the fingerprint code recording unit data reading unit 312 is recorded.

In FIG. 5, the third-party fingerprint code recording unit 314, third-party code recording unit 316, and fingerprint code recording unit 317 are provided in the RAM 28 or the FD mounted on the recording unit 17 shown in FIG. Equivalent to. In FIG. 5, the encoding unit 302, the encryption unit 303, the data reading unit 312, and the re-encryption unit 313 correspond to the MPU shown in FIG.
This is a function realized by executing a program by the CPU 21 or the CPU 26 shown in FIG.

[Processing by Fingerprint Registration System] FIG.
6 is a flowchart showing a process by the fingerprint registration system shown in FIG. The processing shown in FIG. 7 is performed by the IC shown in FIG.
The card 11 is inserted into the IC card input adapter 16, the power of the computer 14 is turned on, and a person who is to register a fingerprint code presses the fingerprint sensor 12 (fingerprint pressure input unit 301) of the IC card 11 with a predetermined finger. Start by.

In FIG. 7, when the process starts, first, a fingerprint pattern is read by the fingerprint sensor 12, and original image data of the fingerprint pattern is obtained (S01).
Then, the coding unit 302 performs leveling processing on the original image data (S02), and performs binarization processing and thinning processing (S03). Thereby, fingerprint data is obtained. Subsequently, the coding unit 302 extracts a plurality of feature points (minutia points) from the fingerprint data, and codes the relative coordinate values of the feature points (S05). The fingerprint code (64 bits) generated by the process of S05 is provided to the encryption unit 303.

When the process of S05 is completed, the personal code used for the process by the encryption unit 303 is input to the code input unit 315 (input device 1) on the display 29 shown in FIG.
Screen for requesting input from 8) (not shown)
Is displayed. At this time, the operator of the computer 14 inputs an instruction to input a personal code into the input device 18.
If the input is made from (S06; YES), the process proceeds to S07.
Proceed to. On the other hand, if the operator inputs an instruction not to input the personal code, the process proceeds to S08.

When the process proceeds to S07, a screen (not shown) for prompting the operator to input a personal code is displayed on the display 29. On the other hand, when the operator inputs a personal code (a 4-bit code of 4 digits) from the code input unit 315, the personal code becomes
It is provided to the encryption unit 303 via the input / output I / F unit 311 and the input / output I / F unit 305. Then, the encryption unit 303
Encrypts the fingerprint code received from the encoding unit 302 according to the DES encryption method using the personal code as an encryption key. As a result, an encryption code is generated. Then, the encryption unit 303 writes the generated encryption code into the fingerprint code recording unit 304 (S11). by this,
The encryption code is registered in the IC card 11.

On the other hand, when the processing has proceeded to S08, a screen (not shown) for asking the operator whether to automatically input the personal code is displayed on the display 29.
Is displayed. At this time, if the operator inputs, for example, an instruction to automatically input a personal code from the input device 18 (S08; YES), the process proceeds to S09.
On the other hand, if the operator inputs an instruction not to automatically input the personal code (S08; NO), the process proceeds to S
Proceed to 10.

When the process proceeds to S09, an instruction to automatically input a personal code is given to encryption section 303. Then, the encryption unit 303 sets the encryption key recording unit 30
The fingerprint code (64 bits) of the other finger stored in 6 is read, and the fingerprint code of the other finger is used as an encryption key, and the fingerprint code received from the encoding unit 302 is encrypted according to the DES encryption method. As a result, an encryption code is generated. Then, the encryption unit 303 writes the generated encryption code in the fingerprint code recording unit 304 (S1).
1). Thereby, the encryption code is registered in the IC card 11.

On the other hand, when the process proceeds to S10, an instruction not to automatically input the personal code is given to encryption section 303. Then, encryption section 303 generates an encryption code by multiplying the fingerprint code received from coding section 302 by a predetermined determinant. And
The encrypting unit 303 stores the encrypted code in the fingerprint code recording unit 3.
04 is written (S11). Thereby, the encryption code is registered in the IC card 11.

As described above, the encryption code obtained by encrypting the fingerprint data is registered in the IC card 11 by the processes of S01 to S11. Thereafter, a screen requesting whether or not to re-encrypt the encryption code is displayed on the display 29.
(Not shown) is displayed. On the other hand, if the operator inputs an instruction to perform re-encryption from the input device 18 (S12; YES), the process proceeds to S13. On the other hand, when the operator inputs an instruction not to re-encrypt (S12; NO), the data reading unit 312 reads the encryption code from the fingerprint code 304, and reads the encryption code from the fingerprint code recording unit 317 in the computer 14. Write to (S1
5), the process by the fingerprint registration system ends. This S
By the processing of No. 15, the encryption code is transferred to the computer 14
Registered in.

When the process proceeds to S13, an instruction to perform re-encryption is given to data reading unit 312. Then, the data reading unit 312 causes the fingerprint code recording unit 304
Is read out and given to the re-encryption unit 313.

Then, the re-encryption unit 313 converts the predetermined third-party code stored in the third-party code recording unit 316.
(64 bits), and encrypts the encrypted code received from the data reading unit 312 in accordance with the DES encryption method using the third party code as an encryption key. As a result, a third-party fingerprint code as a re-encryption code is generated (S1).
4).

Then, the re-encryption unit 313 stores the third-party fingerprint code generated in S14 in the third-party fingerprint code recording unit 3
14 is written (S15). As a result, the third-party fingerprint code obtained by further encrypting the encryption code is stored in the computer 1.
4 is registered. When the process in S15 ends, the process by the fingerprint registration system ends. Thus, S1
Through the processes of 2 to S15, the encrypted code or the third-party fingerprint code is registered in the computer 14.

Thereafter, when the fingerprint pressure input unit 301 is pressed with a finger, the processes of S01 to S05 shown in FIG. 6 are executed, and a fingerprint code to be collated is obtained. If the fingerprint registration system is set to perform fingerprint verification (identification) in the IC card 11, the IC card 1
The first MPU 21 (see FIG. 2) reads the encrypted code stored in the fingerprint code 304, and decrypts the encrypted code to obtain the fingerprint code of the collation source. Then, the fingerprint code of the collation source is compared with the fingerprint code of the collation target.

On the other hand, if the fingerprint registration system is set to perform fingerprint collation in the computer 14, the CPU 26 of the computer 14 sends the fingerprint code 31
7, the corresponding encrypted code is read out, decoded into the fingerprint code of the collation source, and compared with the fingerprint code of the collation target received from the IC card 11.

Alternatively, if the fingerprint registration system is set to perform fingerprint collation using a third-party fingerprint code, the CPU 26 of the computer 14 reads the corresponding third-party fingerprint code from the third-party fingerprint code recording unit 314. Is read out and decoded into the fingerprint code of the collation source, and compared with the fingerprint code of the collation target received from the IC card 11.

If they match, the CPU
Reference numeral 26 denotes a screen indicating, for example, that the fingerprint has been matched or the identity of the user has been confirmed on the display 29.
(Not shown) is displayed. On the other hand, if the two do not match, the CPU 26 causes the display 29 to display a screen (not shown) indicating that the fingerprints do not match or that the user is not the user.

[Effects of the Embodiment] According to the fingerprint registration system according to the present embodiment, the fingerprint pattern read by the fingerprint sensor 12 (fingerprint pressure input unit 301) is coded by the coding unit 302 (S05). The data is encrypted by multiplying by a predetermined determinant (S10) and registered in the fingerprint code recording unit 317 (S11).

As described above, according to the present embodiment, since the fingerprint code is encrypted, even if another person obtains the encrypted code from the IC card 11, the fingerprint code cannot be known. Therefore, fingerprint collation can be performed without disclosing the fingerprint information of the individual to others, and the spread of the fingerprint collation system can be promoted.

Further, according to the fingerprint registration system according to the present embodiment, the encryption unit 303 is selected by the operator.
Performs the encryption process on the fingerprint code using the personal code input from the input device 18 as the encryption key (S0).
6, S07). For this reason, an encryption code that is difficult to decrypt can be registered in the IC card 11 as compared with a case where the encryption unit 303 encrypts the fingerprint code by multiplying it by a matrix.

Further, according to the fingerprint registration system according to the present embodiment, it is possible to set the personal code to be automatically inputted by the selection of the operator (S08). In this case, the encryption unit 303 reads the fingerprint code of another finger from the encryption key recording unit 306, and performs encryption processing on the fingerprint code using the fingerprint code of the other finger as the encryption key (S09). .
For this reason, it is possible to avoid the complexity of inputting a complicated personal code from the code input unit 315, to avoid inputting the personal code one by one, and to improve the security of the personal code. As a result, personal fingerprint information can be easily encrypted by the IC card 11, and highly reliable security can be realized.

Further, according to the fingerprint registration system according to the present embodiment, the re-encryption unit 3 is selected by the operator.
13 generates a third-party fingerprint code obtained by re-encrypting the encryption code, and records it in the third-party fingerprint code recording unit 314 (S
12 to S15). Therefore, when the computer 14 is installed in, for example, a credit card company or a business partner of electronic money, and the fingerprint verification of the customer is performed in the credit card company or the like, the processes in S12 to S15 described above are executed. If this is the case, the confidentiality of the fingerprint information of the individual (customer) can be further increased.

As described above, according to the fingerprint registration system according to the present embodiment, when constructing a fingerprint collation system for a large number of individuals, the confidentiality of the fingerprint information of each individual can be maintained.

In the fingerprint registration system according to the present embodiment, the encryption unit 303 and the encryption key recording unit 306
Although provided in the card 11, these are
It may be provided inside.

[0063]

As described above, according to the fingerprint registration system of the present invention, it is possible to prevent the leakage of personal fingerprint information as compared with the related art, and to obtain a fingerprint by a third party handling a large number of fingerprint information. The confidentiality of information can be realized.

[Brief description of the drawings]

FIG. 1 is an external configuration diagram of a fingerprint registration system according to an embodiment of the present invention.

FIG. 2 is a hardware configuration diagram of the IC card shown in FIG. 1;

FIG. 3 is a configuration diagram of the fingerprint sensor shown in FIG. 2;

FIG. 4 is a hardware configuration diagram of the computer shown in FIG. 1;

FIG. 5 is a functional block diagram of the fingerprint registration system shown in FIG. 1;

FIG. 6 is an explanatory diagram of a process performed by a coding unit shown in FIG. 5;

FIG. 7 is a flowchart showing processing by the fingerprint registration system shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 IC card 12 Pressure type fingerprint sensor 13 IC (encoding means, encryption means, recording means) 14 Computer 16 IC card connector 21 MPU 23 RAM 26 CPU (re-encryption means) 28 RAM 302 Encoding section (encoding means) 303 encryption unit (encryption unit) 304 fingerprint code recording unit (recording unit) 306 encryption key recording unit (encryption key recording unit) 313 re-encryption unit (re-encryption unit) 314 third party code recording unit (second (Three-party code storage means)

Claims (6)

[Claims] A fingerprint sensor for detecting a fingerprint pattern; an encoding means for encoding the fingerprint pattern detected by the fingerprint sensor; and an encryption means for encrypting the fingerprint code encoded by the encoding means. And a recording means for recording the fingerprint code encrypted by the encryption means. 2. The fingerprint registration system according to claim 1, wherein said encrypting means encrypts said fingerprint code using a predetermined personal code as an encryption key. 3. The apparatus according to claim 1, further comprising: an encryption key recording unit that records a fingerprint code of another finger of the same person different from the finger whose fingerprint code is generated by said encoding unit, wherein said encoding unit is provided by said encoding unit. 2. The fingerprint registration according to claim 1, wherein when the fingerprint code is generated, the fingerprint code generated using the fingerprint code of the other finger recorded in the encryption key recording unit as an encryption key is encrypted. system. 4. The fingerprint registration system according to claim 2, further comprising re-encryption means for re-encrypting an encrypted code which is a fingerprint code encrypted by said encryption means. 5. The fingerprint registration system according to claim 4, wherein said re-encryption means re-encrypts said encrypted code using a predetermined third party code as an encryption key. 6. The fingerprint registration system according to claim 5, further comprising third party code storage means for recording said third party code.