JPH09274431A - Recording and reproducing device, recording and reproducing method, signal transmission and reception device and signal transmission and reception method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to nearly surely make personal information confidential by forming the common key of a prescribed format in accordance with the personal fingerprint data and voiceprint data and ciphering information in accordance with the the common key. SOLUTION: The binarized fingerprint image data D1 is formed from finger image in the fingerprint image data forming section 4 of a common key forming circuit 3. The binarzed voiceprint image data D2 is formed from voice data in a voiceprint image data forming section 5. The common key of the prescribed format consisting of the fingerprints and voice prints specific to the individual persons is formed from the fingerprint image data D1 and the voiceprint image dada D2 in a common key forming section 6. In the case of recording of the information, the common key data D3 meeting the common key is inputted to a ciphering section 8 and the information data D4 meeting the desired information is inputted thereto. The encryption information is then formed by encryption in accordance with the common key. The encryption data D5 is transmitted via an IC card recording section 11 to an IC card 2.

Description

Detailed Description of the Invention

[0001]

[Table of Contents] The present invention will be described in the following order. Technical Field to which the Invention pertains Related Art Problems to be Solved by the Invention Means for Solving the Problems (FIGS. 1 to 4) Embodiments of the Invention (FIGS. 1 to 4) Effects of the Invention

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus, a recording / reproducing method, a transmitting / receiving apparatus and a transmitting / receiving method, for example, while encrypting and recording or transmitting desired information, the encrypted information (hereinafter referred to as "encrypted information"). It is suitable to be applied to a recording / reproducing apparatus or a transmitting / receiving apparatus that reproduces or receives (encoded information) and decodes the same, and a recording / reproducing method or a transmitting / receiving method using these apparatuses.

[0003]

2. Description of the Related Art Conventionally, in this type of recording / reproducing apparatus, an IC (Integrated Circuit) card is used as a recording medium. In recent years, IC cards have begun to be widely used as cash cards used for financial settlement on networks, ID (Identification) cards for identifying individuals, introductory certificates for specific facilities, and even medical examination tickets for hospitals. Personal information is recorded.

Therefore, in the recording / reproducing apparatus, when personal information or the like is recorded on the IC card, the personal information or the like is encrypted and recorded as the encrypted information on the IC card. As a result, it is possible to ensure the safety (security) of personal information and the like recorded on the IC card.

[0005]

By the way, in the recording / reproducing apparatus, when an individual is authenticated with an IC card or when the encrypted information recorded in the IC card is decrypted, it is peculiar to the individual. A password such as a password is used. However, such a password may be easily found by an unauthorized user. Therefore, an unauthorized user can easily decrypt the information of another person recorded in the IC card, and the unauthorized user can easily operate various systems that require the IC card by using the IC card. There was a problem.

The present invention has been made in consideration of the above points, and it is an object of the present invention to propose a recording / reproducing apparatus, a recording / reproducing method, a transmitting / receiving apparatus, and a transmitting / receiving method that can conceal private information almost certainly.

[0007]

In order to solve such a problem, in the present invention, desired information is encrypted and recorded in a recording medium, and the encrypted information is reproduced from the recording medium to decrypt the information. In the recording / reproducing apparatus, a common key generation unit that generates a common key of a predetermined format based on the fingerprint data and voiceprint data of an individual, an encryption unit that encrypts information based on the common key, and a common key based on the common key. Decoding means for decoding encrypted information is provided.

In the present invention, the first step of generating a common key of a predetermined format based on the fingerprint data and voiceprint data of an individual, and desired information is encrypted based on the common key and recorded on a recording medium. There is provided a second step and a third step for reproducing the encrypted information from the recording medium and decrypting the encrypted information based on the common key.

Further, according to the present invention, in a transmitting / receiving apparatus for encrypting and transmitting desired information and receiving and decoding the encrypted information, a predetermined format is obtained based on personal fingerprint data and voiceprint data. A common key generation means for generating the common key, an encryption means for encrypting information based on the common key, and a decryption means for decrypting the information encrypted based on the common key. I chose

Further, according to the present invention, a first step for generating a common key of a predetermined format based on individual fingerprint data and voiceprint data, and a second step for encrypting and transmitting desired information based on the common key. And a third step of receiving the encrypted information and decrypting the encrypted information based on the common key.

Therefore, according to the present invention, desired fingerprint information is encrypted and recorded on a recording medium, and at the same time, in a recording / reproducing apparatus for reproducing the encrypted information from the recording medium to decrypt the information, individual fingerprint data and A common key generation unit that generates a common key of a predetermined format based on voiceprint data, an encryption unit that encrypts information based on the common key, and a decryption unit that decrypts information encrypted based on the common key. By providing the encryption means, it is possible to generate a common key that is not easily detected by an unauthorized user, and thus it is possible to prevent the encrypted information from being decrypted.

Further, according to the present invention, a common key of a predetermined format is generated based on the fingerprint data and voiceprint data of an individual, then desired information is encrypted based on the common key and recorded on a recording medium, and then the concerned information is recorded. By reproducing the encrypted information from the recording medium and decrypting the encrypted information based on the common key, it is possible to prevent the encrypted information from being decrypted.

Further, according to the present invention, in a transmitting / receiving apparatus for encrypting and transmitting desired information and receiving and decoding the encrypted information, a predetermined format is obtained based on personal fingerprint data and voiceprint data. A common key generation means for generating a common key, an encryption means for encrypting information based on the common key, and a decryption means for decrypting the information encrypted based on the common key are provided. By doing so, it is possible to generate a common key that is not easily discovered by an unauthorized user, so even if encrypted information is received by another transmitting / receiving device during transmission, It is possible to prevent decryption during transmission.

Further, according to the present invention, a common key of a predetermined format is generated based on individual fingerprint data and voiceprint data, and then desired information is encrypted and transmitted based on the common key, followed by encryption. By receiving the information and decrypting the encrypted information based on the common key, even if the encrypted information is received by another transmitting / receiving device during transmission, the encrypted information will be encrypted. It is possible to prevent the decipherment of the information that has been obtained.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a recording / reproducing apparatus according to an embodiment as a whole, which generates a common key based on a fingerprint and voiceprint peculiar to an individual, and encrypts desired information based on the common key to IC. While recording on the card 2,
The encrypted information can be reproduced from the C card 2 and decrypted based on the common key.

In this case, a predetermined television camera (not shown) images a predetermined finger of an individual, and a finger image signal S1 corresponding to the image of this finger is provided in the common key generation circuit 3 and the fingerprint image data generation unit 4 is provided. To enter. A personal voice corresponding to a predetermined character is input by a microphone (not shown), and a voice signal S2 corresponding to the voice is input to the common key generation circuit 3
To the voice print image data generation unit 5.

First, the fingerprint image data generator 4 converts the input finger image signal S1 into finger image data via an analog digital converter (not shown) (hereinafter referred to as an A / D converter). , The finger image data is integrated and averaged over a predetermined number of frames. As a result, finger image data with reduced noise is obtained, and then each pixel of the finger image data is binarized by comparing it with a predetermined first threshold value. Thus, the fingerprint image data generation unit 4 generates voiceprint image data D1 that forms a black pattern along the shape of the groove of the fingerprint, and sends the fingerprint image data D1 to the common key generation unit 6 of the common key generation circuit 3. To do.

On the other hand, the voiceprint image data generator 4 converts the input voice signal S2 into voice data through an A / D converter (not shown), and the voice data is voiced by a predetermined formant frequency analyzer (not shown). The frequency is divided for each frequency band corresponding to the phoneme of the above and the frequency for each frequency band is extracted. After that, the voice data is converted into a voice waveform image based on the frequency of each frequency band to generate voice image data based on the image. Next, each pixel of the audio image data is compared with a predetermined second threshold value to determine 2
Value. Thus, the voiceprint image data generation unit 5 generates voiceprint image data D2 that forms a black pattern along the shape of the voiceprint, and sends the voiceprint image data D2 to the common key generation unit 6.

The common key generation unit 6 converts the format of the input voice image data D1 and voiceprint image data D2 into a predetermined format to generate a common key unique to an individual, and the common key data corresponding to the common key. D3 is sent to the encryption section 8 and the decryption section 9 of the recording / reproducing circuit 7, respectively.

First, in the recording / reproducing apparatus 1, when recording desired information, the host computer 1
Information data D4 corresponding to information such as medical care information is input to the encryption unit 8 from 0, and common key data D3 is input to the encryption unit 8 from the common key generation unit 6. The encryption unit 8
RSA (Rivest-Shamir-Adlema) based on the principle of factorization
n) The information corresponding to the information data D4 is encrypted by the encryption method based on the common key to generate the encrypted information, and the encrypted information data D5 corresponding to the encrypted information is sent to the IC card recording unit 11.

When the encrypted information data D5 is input, the IC card recording unit 11 outputs the recording start signal S3 to the terminal 12.
The format of the encrypted information data D5 is converted into a recording format in the IC card 2 while being sent to the IC card 2 via the. Thereafter, the encrypted information data D6 obtained by converting the format is sent to the IC card 2. Here, the IC card 2 includes the IC card 2 and the recording / reproducing circuit 7
An interface (I / F) 15 for connecting to and a ROM (Read Only Memo) in which the encrypted information data D6 is recorded.
ry) 16 and the encrypted information data D6 in the ROM 16 or the encrypted information data D6 from the ROM 16
A RAM (Random Access Memory) 17 in which a predetermined recording program and a reproducing program for reproducing is written is connected to the CPU 19 via an internal bus 18.

In actuality, in the IC card 2, the recording start signal S3 output from the IC card recording unit 11 is I / F.
15 is input to the I / F 15, and the input recording start signal S3 is sent to the CPU 19 via the internal bus 18. The CPU 19 sends the recording control signal S4 based on the input recording start signal S3 to the RAM1 via the internal bus 18.
7 and starts the recording program written in the RAM 17 to control the I / F 15 and the ROM 16 based on the recording program.

At this time, the I / F 15 is supplied with the encrypted information data D6 from the IC card recording unit 11, and the CPU 1
Reference numeral 9 denotes the encrypted information data D6 from the I / F 15 to the internal bus 1
Then, the encrypted information data D6 is sent to the ROM 16 via the ROM 8 and the encrypted information data D6 is recorded in the ROM 16. As described above, in the recording / reproducing apparatus 1, desired information encrypted based on the common key can be recorded in the ROM 16 in the IC card 2.

On the other hand, in the recording / reproducing apparatus 1, when reproducing desired information, the host computer 10 sends a reproduction start signal (not shown) for the desired information to the IC card reproducing section 20 of the recording / reproducing circuit 7, The IC card reproducing unit 20 receives the input reproduction start signal S5 from the terminal 1
2 to the I / F 15 of the IC card 2. I /
F15 sends the input reproduction start signal S5 to the CPU 19 via the internal bus 18. The CPU 19 sends a reproduction control signal S6 to the RAM 17 via the internal bus 18 based on the input reproduction start signal S5, and the RAM 17 concerned.
Based on this reproduction program, the I / F 15 and RO are started by activating the reproduction program written in
Control M16. This causes the CPU 19 to read the ROM1
6 reproduces the desired encrypted information data D6 among the plurality of encrypted information data D6 recorded in 6, and the encrypted information data D6 is transferred to the IC card reproducing unit 20 through the internal bus 18 and the I / F 15 in sequence. Send out.

The IC card reproducing section 20 converts the format of the input encrypted information data D6 (the recording format in the IC card 2) into the format in the recording / reproducing apparatus 1, and the encrypted information obtained by converting the format. The data D7 is sent to the decoding unit 8. The common key data D3 is input from the common key generation unit 6 to the encryption / decryption unit 8,
The encrypted information corresponding to the encrypted information data D7 is decrypted by the RSA encryption method based on the common key of the common key data D3. As a result, the decoding unit 8 sends the information data D8 corresponding to the decoded information to the host computer 10. As described above, in the recording / reproducing apparatus 1, the encrypted information can be reproduced from the IC card 2 and the encrypted information can be decrypted based on the common key. The host computer 10 displays information according to the input information data D8 on a display unit (not shown) or outputs it via a predetermined output unit (not shown) such as a printer.

In practice, as shown in FIG. 2, the common key generation section 6 of the common key generation circuit 3 comprises a fingerprint / voiceprint data extraction section 25 and a predetermined format conversion section 26. In this case, first, the fingerprint image data D1 output from the fingerprint image data generation unit 4 is input to the first thinning unit 27 of the fingerprint and voiceprint data extraction unit 25,
The first thinning unit 27 performs variable subsampling on the image based on the fingerprint image data D1. As a result, the first thinning unit 27 thins the redundant portion other than the portion where the fingerprint grooves are densely compressed to compress the image.
An image having a size of × 256 pixels and a relatively strong fingerprint characteristic is generated, and the fingerprint data D10 based on the image is sent to the format conversion unit 26.

On the other hand, the voiceprint image data D2 output from the voiceprint image data generation unit 5 is input to the second thinning unit 28 of the fingerprint and voiceprint data extraction unit 25, and the second thinning unit 28 outputs the voiceprint image. Variable sub-sampling is performed on the image based on the data D2 as in the case of the first thinning unit 27 described above. As a result, the second decimation unit 28 decimates the redundant portion other than the dense voiceprint portion to compress the image, and has a size of, for example, 256 × 256 pixels, and the voiceprint characteristic is relatively strong. An image is generated and the voiceprint data D11 based on the image is converted into the format conversion unit 26.
To send to.

Here, as shown in FIG. 3, the format conversion unit 26 performs the first conversion based on the input fingerprint data D10.
The exclusive OR is sequentially performed in the horizontal and vertical directions of the image 30 to obtain 256-bit data 31 and 32 in the horizontal and vertical directions of the first image 30, respectively. After that, these data are connected by a predetermined format to obtain the first data of 512 bits. In addition, the exclusive OR is sequentially performed in the horizontal direction and the vertical direction of the second image 33 based on the input voiceprint data D11 to obtain the second image.
The data 34 and 35 of 256 bits are obtained in the horizontal and vertical directions of the image 33 of FIG. After that, each of these data are connected by a predetermined format and the second 512-bit data is connected.
To get the data.

Next, the format conversion unit 26 parallelizes the first data obtained from the fingerprint data D10 and the second data obtained from the voiceprint data D11, and the horizontal data of these first and second data is obtained. Exclusive OR is performed sequentially in the vertical and vertical directions. As a result, two bits of data are obtained in the lateral direction of the first and second data, and
Data of 512 bits is obtained in the vertical direction of the first and second data. After that, the format conversion unit 26 connects the 2-bit data and the 512-bit data by a predetermined format, so that the characteristics of the fingerprint and the voiceprint peculiar to the individual are strong, and they are not easily seen.
It is designed so that a common key consisting of 4 bits of data can be generated.

In the recording / reproducing apparatus 1 having the above structure, the fingerprint image data generation unit 4 first generates the fingerprint image data D1 obtained by binarizing the image of the finger and sends it to the common key generation unit 6. In addition, the voiceprint image data generation unit 5 generates voiceprint image data D2 by converting the voice data into an image and binarizing it, and sends it to the common key generation unit 6.
Next, in the first thinning unit 27, the fingerprint image data D1
The fingerprint data D10 is generated by thinning out the image based on so that the fingerprint has a relatively strong feature, and is sent to the format conversion unit 26. The second decimation unit 28 decimates the image based on the voiceprint image data D2 so that the features of the voiceprint are relatively strong, thereby generating the voiceprint data D11 and sending it to the format conversion unit 26.

Subsequently, a common key of a predetermined format is generated based on the fingerprint data D10 and the voiceprint data D11 input by the format conversion unit 26. Thus, in the recording / reproducing apparatus 1, when information is first recorded, the common key data D3 corresponding to the common key is input to the encryption unit 8 and the information data D4 corresponding to the desired information is input. The encryption unit 8 encrypts desired information based on the common key to generate encrypted information. Thus, by sending the encrypted information data D5 corresponding to the encrypted information to the IC card 2 via the IC card recording unit 11, the encrypted information can be recorded in the IC card 2.

On the other hand, when reproducing the information, the desired encrypted information data D6 is reproduced from the IC card 2, and the encrypted information data D6 is input to the decrypting unit 9 via the IC card reproducing unit 20. At the same time, the common key data D3 is input to the decryption unit 9. Thus, the decryption unit 9 can decrypt the encrypted information corresponding to the encrypted information data D7 based on the common key.

Therefore, in the recording / reproducing apparatus 1, the fingerprint image data generating unit 4 of the common key generating circuit 3 generates the binary fingerprint image data D1 from the finger image data, and the voiceprint image data generating unit 5 generates it. Binarized voice print image data D2 is generated from the voice data, and the common key generation unit 6 generates the fingerprint image data D1 and the voice print image data D.
2 to fingerprint data D10 and voiceprint data D11, respectively
And a common key of a predetermined format consisting of fingerprints and voiceprints unique to the individual is generated based on the fingerprint data D10 and the voiceprint data D11. Can be generated. Further, in the recording / reproducing apparatus 1, by generating such a common key, it is possible to almost completely prevent an unauthorized user from using the personal IC card 2.

Further, in the recording / reproducing apparatus 1, the fingerprint and voiceprint data generating section 25 uses the fingerprint image data D.
1 and the voice print image data D2 are thinned out so that the characteristics of the individual fingerprint and voice print are relatively strong, and the fingerprint data D
10 and the voice print data D11, and the first image based on the fingerprint data D1 and the voice print data D11.
And the second image based on the above are sequentially subjected to exclusive OR in the horizontal direction and the vertical direction, respectively, and the common key is generated based on the first and second data obtained thereby, It is possible to make it difficult for an unauthorized user to easily discover the common key.

According to the above configuration, the fingerprint data D10 and the voiceprint data D11 are respectively generated based on the fingerprint and the voiceprint peculiar to the individual, and the common key of the predetermined format is generated based on the fingerprint data D10 and the voiceprint data D11. A common key generating circuit, an encryption unit 8 that encrypts desired information based on the common key, and a decryption unit 9 that decrypts encrypted information based on the common key are provided. By doing so, it is possible to generate a common key that is difficult for an unauthorized user to easily discover, so that it is possible to prevent the decryption of encrypted information and thus realize a recording / reproducing device that can almost certainly conceal personal information. can do.

Further, according to the above configuration, the fingerprint data D10 and the voiceprint data D11 are respectively generated based on the fingerprint and the voiceprint peculiar to the individual, and the fingerprint data D10 is generated.
A common key of a predetermined format is generated based on 10 and voiceprint data D11, then desired information is encrypted based on the common key, and then the encrypted information is decrypted based on the common key. As a result, it is possible to prevent the decryption of the encrypted information, and thus it is possible to realize a recording / reproducing method that can almost certainly conceal personal information.

In the above embodiment, the case where the present invention is applied to the recording / reproducing apparatus 1 has been described, but the present invention is not limited to this, and for example, I of the recording / reproducing apparatus 1 is described.
It may be applied to a transmission / reception device in which a predetermined transmission circuit is provided instead of the C card recording unit 11 and a predetermined reception circuit is provided instead of the IC card reproduction unit 20.

Here, in actuality, in the transmitting / receiving device, when transmitting desired information, the common key generation circuit, like the recording / reproducing device 1, first uses fingerprints and voiceprints unique to the individual, respectively. Data and voiceprint data are generated, and a common key of a predetermined format is generated based on the fingerprint data and voiceprint data and sent to the encryption unit. Next, in the encryption unit, desired information input from the host computer is encrypted based on a common key by, for example, the RSA cryptosystem, and sent to the transmission circuit. Then, the transmission circuit converts the input encrypted information into a predetermined format for transmission and transmits it.

On the other hand, when the transmitter / receiver receives the encrypted information, the receiver circuit receives the encrypted information transmitted from the outside, and the receiver circuit transmits the encrypted information to the predetermined information in the transmitter / receiver. It is converted into a format and sent to the decoding section. In this case, the above-mentioned common key is input to the decryption unit, and the encryption information is decrypted by the RSA encryption method based on the common key. As a result, in this transmission / reception device, even if the encrypted information being transmitted is received by another transmission / reception device, the decryption of the encrypted information can be prevented, and thus the personal information being transmitted can be almost certainly concealed. It is possible to realize an obtained transmitting / receiving device and transmitting / receiving method.

In the above embodiment, the encryption unit 8
The description has been made on the case where the desired information and the encrypted information respectively inputted in the decryption unit 9 are encrypted and decrypted by the RSA encryption method based on the common key. Without being limited to the RSA cryptosystem, various other cryptosystems such as a Williams cryptosystem based on the principle of factorization, a Lapin cryptosystem and a reciprocal cryptosystem, or a McLease cryptosystem based on the error correction code are used. Is also good.

Further, in the above embodiment, the horizontal and vertical directions of the first and second images 30 and 33 based on the fingerprint data D10 and the voice print data D11 input in the format conversion unit 26 of the common key generation unit 6 are used. The case where the common key is generated by sequentially performing the exclusive OR is described above, but the present invention is not limited to this, and the common key of a predetermined format is generated based on various other methods. You may do it.

Here, as shown in FIG. 4, for example, in the format conversion unit 26, the third length obtained by performing the run length coding along the scanning line of the first image 30 based on the fingerprint data D10 is obtained. One of the short third data (or the fourth data) of the data and the fourth data obtained by performing the run length encoding along the scanning line of the second image 33 based on the voiceprint data D11. On the other hand, predetermined dummy data is connected so as to match the length of the other long fourth data (or third data). After that, the third and fourth data are arranged in parallel and the exclusive OR is sequentially performed in the horizontal direction and the vertical direction.
The common key may be generated by connecting the data obtained in the horizontal direction and the data obtained in the vertical direction of the fourth data, respectively.

Further, after the exclusive OR is performed in the horizontal direction and the vertical direction of the first image 30 based on the fingerprint data D10 and the second image 33 based on the voice print data D11, respectively, or as described above, After run-length coding is performed along the scan lines of the second images 30 and 33, the bits of the data obtained in the fingerprint data D10 and the data of the voiceprint data D11 are alternately arranged and connected, or randomly connected. The common key may be generated in this way. This makes it more difficult for an unauthorized user to discover the common key than in the case of the embodiment.

Further, in the above-described embodiment, the fingerprint image data D1 and the voice print image data D2 are thinned out and compressed in the first thinning unit 27 and the second thinning unit 28, respectively, to obtain a size of about 256 × 256 pixels. The case where the fingerprint data D10 and the voiceprint data D11 that are described above are generated has been described, but the present invention is not limited to this.
If the characteristics of the individual fingerprint and voiceprint can be made relatively strong in the first thinning unit 27 and the second thinning unit 28, fingerprint data D10 and voiceprint data D11 based on images of various sizes are generated. It may be done.

Further, in the above-described embodiment, the fingerprint image data generation unit 4 converts the image based on the finger image data into two.
After digitizing the fingerprint image data D1 and imaging the voice data in the voice print image data generation unit 5,
The case where the image is binarized to generate the voice print image data D2 has been described, but the present invention is not limited to this, and if the groove of the fingerprint and the shape of the voice print can be discriminated, it is based on the finger image data. Fingerprint image data D1 and voiceprint image data D2 are obtained by comparing each pixel of the image and each pixel of the image obtained by converting the image of the voice data with a plurality of predetermined thresholds to make each image multi-valued. May be generated.

Furthermore, in the above-mentioned embodiment, the case where the IC card 2 is used as the recording medium used in the recording / reproducing apparatus 1 has been described, but the present invention is not limited to this, and a magnetic stripe card, an optical card, or the like can be used. In addition to this, various recording media may be used.

[0048]

As described above, according to the present invention, the common key generating means for generating the common key of the predetermined format based on the personal fingerprint data and the voice print data, and the encryption for encrypting the information based on the common key. By providing the encryption means and the decryption means for decrypting the information encrypted based on the common key, it is possible to generate a common key that is difficult for an unauthorized user to easily detect. Therefore, it is possible to prevent the decryption of the encrypted information, and thus it is possible to realize the recording / reproducing apparatus which can almost certainly conceal the private information.

As described above, according to the present invention, a common key of a predetermined format is generated based on the individual fingerprint data and voiceprint data, and then the desired information is encrypted based on the common key and recorded on the recording medium. Prevents decryption of the encrypted information by recording and then reproducing the encrypted information from the recording medium and decrypting the encrypted information based on the common key. Therefore, it is possible to realize a recording / reproducing method that can almost certainly conceal personal information.

Further, as described above, according to the present invention, the common key generating means for generating the common key of the predetermined format based on the individual fingerprint data and the voice print data, and the encryption for encrypting the information based on the common key. By providing the means and the decryption means for decrypting the information encrypted on the basis of the common key, it is possible to generate a common key which is difficult for an unauthorized user to easily detect. , Even if the encrypted information is received by another transmitting / receiving device during transmission, it is possible to prevent the encrypted information from being decrypted during transmission, and thus the private information during transmission is almost certainly concealed. It is possible to realize a transmitting / receiving device to obtain.

Further, as described above, according to the present invention, a common key of a predetermined format is generated based on the fingerprint data and voiceprint data of an individual, and then the desired information is encrypted and transmitted based on the common key. Then, by receiving the encrypted information and decrypting the encrypted information based on the common key, the encrypted information was received by another transmission / reception device during transmission. Even in such a case, it is possible to prevent the decryption of the encrypted information, and thus it is possible to realize a transmission / reception device that can almost certainly conceal personal information during transmission.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an encryption key generation unit of a recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 3 is a schematic diagram for explaining exclusive OR in the format conversion unit of the encryption key generation unit according to the embodiment of the present invention.

FIG. 4 is a schematic diagram for explaining run-length encoding in a format conversion unit of an encryption key generation unit according to another embodiment.

[Explanation of symbols]

1 ... Recording / reproducing device, 2 ... IC card, 3 ... Common key generation circuit, 4 ... Fingerprint image data generation unit, 5 ... Voiceprint image data generation unit, 6 ... Common key generation unit, 8 ... Encryption unit, 9 ... Decoding unit, 25 ... Fingerprint and voiceprint data extraction unit, 26 ... Format conversion unit, 27 ... First decimation unit, 28 ... Second decimation unit.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G06K 17/00 G06F 15/62 460 H04L 9/08 465U 9/30 H04L 9/00 601Z 9/32 601E 663B 673D 673E

Claims (16)

[Claims] 1. A recording / reproducing apparatus which encrypts desired information and records it on a recording medium, and reproduces the encrypted information from the recording medium to decrypt it. A common key generation means for generating a common key of a predetermined format based on the above, an encryption means for encrypting the information based on the common key, and a decryption of the encrypted information based on the common key. A recording / reproducing apparatus comprising: a decoding unit. 2. The common key generation means is a fingerprint image data generation means for generating fingerprint image data of the finger by converting the finger image data obtained by picking up an image of a predetermined finger of the individual into multiple values. , The voice data obtained by inputting the predetermined voice of the individual is imaged based on the frequency of the voice to generate voice image data, and the voiceprint of the voice is generated by converting the voice image data into multi-valued data. And a fingerprint and voiceprint data extracting means for thinning out the fingerprint image data to extract the fingerprint data, and thinning out the voiceprint image data to extract the voiceprint data. The recording / reproducing apparatus according to claim 1, wherein: 3. The common key generating means obtains a first exclusive-OR obtained by sequentially performing an exclusive OR in the horizontal direction and / or the vertical direction of the first image based on the fingerprint data.
And the second data obtained by sequentially performing the exclusive OR in the horizontal direction and / or the vertical direction of the second image based on the voiceprint data, the common key is generated. The recording / reproducing apparatus according to claim 1. 4. The common key generating means, based on the voiceprint data, and third data obtained by performing run-length coding along a scanning line of the first image based on the fingerprint data. The recording / reproducing apparatus according to claim 1, wherein the common key is generated based on fourth data obtained by performing run-length encoding along a scanning line of the second image. 5. A first step of generating a common key of a predetermined format based on personal fingerprint data and voiceprint data, and a second step of encrypting desired information based on the common key and recording it on a recording medium. A recording / reproducing method comprising: a step; and a third step of reproducing the encrypted information from the recording medium and decoding the encrypted information based on the common key. . 6. In the first step, finger image data obtained by imaging a predetermined finger of the individual is multi-valued to generate fingerprint image data of the finger, and the predetermined fingerprint of the individual is generated. The voice data obtained by inputting the voice is imaged based on the frequency of the voice to generate the voice image data, and the voiceprint image data of the voice is generated by multivalued the voice image data, 6. The recording / reproducing method according to claim 5, further comprising thinning out the fingerprint image data to extract the fingerprint data, and thinning out the voiceprint image data to extract the voiceprint data. 7. The first step is a first image obtained by sequentially performing an exclusive OR in a horizontal direction and / or a vertical direction of the first image based on the fingerprint data.
And the second data obtained by sequentially performing the exclusive OR in the horizontal direction and / or the vertical direction of the second image based on the voiceprint data, the common key is generated. The recording / reproducing method according to claim 5. 8. In the first step, third data obtained by performing run-length encoding along a scan line of the first image based on the fingerprint data, and the voiceprint data based on the third data. The recording / reproducing method according to claim 5, wherein the common key is generated based on fourth data obtained by performing run-length encoding along a scanning line of the second image. 9. The desired information is encrypted and transmitted, and
In a transmission / reception device that receives and decodes the encrypted information, a common key generation unit that generates a common key of a predetermined format based on individual fingerprint data and voiceprint data, and the above information based on the common key. A transmitter / receiver, comprising: an encryption unit for encrypting the encrypted data and a decryption unit for decoding the encrypted information based on the common key. 10. The common key generating means is a fingerprint image data generating means for generating fingerprint image data of the finger by converting the finger image data obtained by picking up an image of a predetermined finger of the individual into multi-valued data. , The voice data obtained by inputting the predetermined voice of the individual is imaged based on the frequency of the voice to generate voice image data, and the voiceprint of the voice is generated by converting the voice image data into multi-valued data. And a fingerprint and voiceprint data extracting means for thinning out the fingerprint image data to extract the fingerprint data, and thinning out the voiceprint image data to extract the voiceprint data. The transmission / reception device according to claim 9, wherein 11. The common key generating means obtains a first exclusive OR obtained by sequentially performing a horizontal and / or vertical direction of the first image based on the fingerprint data.
And the second data obtained by sequentially performing the exclusive OR in the horizontal direction and / or the vertical direction of the second image based on the voiceprint data, the common key is generated. The transmitter / receiver according to claim 9. 12. The common key generating means, based on the voiceprint data, and third data obtained by performing run-length encoding along a scanning line of the first image based on the fingerprint data. 10. The transmitter / receiver according to claim 9, wherein the common key is generated based on fourth data obtained by performing run-length encoding along a scan line of the second image. 13. A first step of generating a common key of a predetermined format based on personal fingerprint data and voiceprint data, and a second step of encrypting and transmitting desired information based on the common key. A third step of receiving the encrypted information and decrypting the encrypted information based on the common key. 14. In the first step, fingerprint image data of the finger is generated by multi-valued finger image data obtained by capturing an image of a predetermined finger of the individual, and the fingerprint image data of the finger is generated. The voice data obtained by inputting the voice is imaged based on the frequency of the voice to generate the voice image data, and the voiceprint image data of the voice is generated by multivalued the voice image data, 14. The transmission / reception method according to claim 13, wherein the fingerprint image data is thinned out to extract the fingerprint data, and the voiceprint image data is thinned out to extract the voiceprint data. 15. The first step is a first image obtained by sequentially performing an exclusive OR in the horizontal direction and / or the vertical direction of the first image based on the fingerprint data.
And the second data obtained by sequentially performing the exclusive OR in the horizontal direction and / or the vertical direction of the second image based on the voiceprint data, the common key is generated. The transmission / reception method according to claim 13. 16. In the first step, third data obtained by performing run-length encoding along a scanning line of the first image based on the fingerprint data, and the voiceprint data based on the third data. 14. The transmission / reception method according to claim 13, wherein the common key is generated based on the fourth data obtained by performing run-length encoding along the scanning line of the second image.