JP4702033B2 - Business cards and terminal devices - Google Patents

Description

  The present invention reads a public key recorded with a two-dimensional code on a business card in which the personal information of the person and a public key used for encrypting the electronic mail information are recorded in a two-dimensional code, and encrypts the electronic mail The present invention relates to a terminal device that can transmit.

For example, the business card disclosed in Patent Document 1 has personal information such as the name, address, telephone number, and mail address of the user (name holder) recorded in plain text on the front side, and the personal information on the back side. It is recorded as a dimension code.
JP 2001-260575 A

The business card described in Patent Document 1, since the personal information of the holder himself is recorded as a two-dimensional code, in the terminal device such as PCs and mobile phones, means for decrypting the two-dimensional code With what you have, you can capture personal information without errors. In this case, since the mail address of the person is also coded and recorded in the two-dimensional code of the business card, the mail address of the name card holder can be taken into the terminal device without error.

By the way, the contents of sent and received e-mails are usually stored in a memory. For this reason, if you send and receive e-mails using a family-shared computer, or leave the mobile phone used to send and receive e-mails on the desk, the contents of the e-mail will be sent to others. There is a risk of peeping.
To prevent others from knowing the contents of the e-mail, it is better to encrypt the e-mail. However, in the encryption using the public key method normally used, the public key is exchanged with the other party by e-mail, or the public key is registered in the key server and the public key is exchanged with the other party through the key server. There was a problem that it was necessary to do it and it was annoying.

  The present invention has been made in view of the above circumstances. The purpose of the present invention is to enable a sender to easily acquire a public key of a transmission partner without error when an electronic mail is encrypted and transmitted by a public key method. Another object is to provide a terminal device that can easily encrypt and transmit e-mail information using information recorded on the business card.

  According to the invention of claim 1, the sender sends the first two-dimensional code representing the personal information including the name, address and email address of the holder and the e-mail information to be sent to the holder on the business card. Since the second two-dimensional code representing the public key of the holder himself / herself used when encrypting with the public key method is recorded, the second two-dimensional code is read by the optical reader to be disclosed. The key can be easily acquired without error.

In addition , since the third two-dimensional code representing both the personal information of the holder and the public key is recorded on the business card, for example, when the address book of the holder of the business card is newly created, the personal information and the public information are disclosed. Keys can be acquired simultaneously, improving convenience.

According to the invention of claim 2 , since the first to third two-dimensional codes shown on the business card are all of the same type, only one type of two-dimensional code decoding software provided in the optical reader is sufficient.
According to the invention of claim 3 , the first two-dimensional code is recorded on the surface where the personal information of the right holder is recorded in plain text, and the second two-dimensional code is recorded on the other surface. Since the third two-dimensional code is recorded, the three two-dimensional codes can be separated, and the two-dimensional code can be easily photographed by the optical reader.

According to the invention of claim 4 , the terminal device is a communication means for sending and receiving e-mails via a communication network, a photographing means for photographing a two-dimensional code, a decoding means for decoding the photographed two-dimensional code, When the second two-dimensional code of the business card is photographed by the photographing means and decrypted by the decrypting means, a public key setting means for setting the decrypted information as a public key, and a public key set with information to be transmitted by e-mail And encrypting the information to be sent by e-mail by taking the public key from the business card without error, and addressing it to the holder of the business card Can be sent.

According to the invention of claim 5 , the terminal device includes an address book storage means for storing the personal information of a plurality of persons in each address area, and the first two-dimensional code recorded on the business card is obtained by the photographing means. Since it is provided with storage control means for storing the decrypted information in the address area of the address book storage means when photographed and decrypted by the decrypting means, the personal information of the right holder can be accurately and easily obtained from the business card. Can be registered.

According to the invention of claim 6 , when the second two-dimensional code recorded on the business card is photographed by the photographing means and decrypted by the decrypting means, the terminal device stores the public key as the decryption information for the address book. Since it is stored as one piece of personal information in the address area of the holder of the name card of the means, the public key of the name holder can be accurately and easily registered from the name card.

According to the invention of claim 7 , when the third two-dimensional code recorded on the business card is photographed by the photographing means and decoded by the decoding means, the terminal device stores the decoded information in the address area of the address book storage means. Since it is memorized, when the name holder of the business card is newly registered in the address book, this can be performed accurately and easily.

According to the invention of claim 8 , since the terminal device displays the transmission mail information encrypted when displaying the list of the transmission mail information on the display means so as to be distinguished from other transmission mail information, it is encrypted. Thus, even if it is displayed, it is not possible to display and operate without knowing the transmitted mail whose contents cannot be read.

According to the invention of claim 9 , when the received mail sent to the owner of the terminal device is encrypted, the terminal device decrypts the encrypted received mail information using the secret key. Can be displayed on the display means.

According to the invention of claim 1 0, the terminal device, when displaying on the display means a list of the received electronic mail information, so displays the received mail information encrypted separately from other incoming mail information, encryption It is not possible to display and operate without knowing the received mail that cannot be read.

  Hereinafter, an embodiment in which the present invention is applied to a camera-equipped mobile phone will be described with reference to the drawings. FIG. 1 is a block diagram showing an electrical configuration of a camera-equipped cellular phone 1 as a terminal device. As shown in FIG. 1, a wireless communication unit 3 as a communication unit is connected to a control unit 2 as a control unit. A speaker 4, a microphone 5, a camera unit 6 as a photographing unit, a display unit 7 as a display unit, an operation unit 8 as an operation unit, and a storage unit 9 as a storage unit are connected.

  The control unit 2 is composed of a microcomputer and performs overall control. The wireless communication unit 3 can make a call with another terminal device A such as another mobile phone or a fixed phone via the communication network 10 by wireless communication, and can send an e-mail to the other terminal device A. You can send and receive. The speaker 4 outputs the other party's voice during a call. The microphone 5 is for inputting a user's voice to be transmitted to the other party during a call.

  The camera unit 6 is composed of a CCD area sensor or the like, and shoots a desired shooting target. The captured image of the camera unit 6 is subjected to image processing by the control unit 2 and stored in the image storage area 9 a of the storage unit 9. The display unit 7 includes a liquid crystal display, and can display captured images in addition to characters and symbols. The operation unit 8 includes a numeric keypad and other function keys for inputting a telephone number, creating e-mail text, switching modes, and the like. The storage unit 9 includes a RAM, a flash memory, and the like. The storage areas are the image storage area 9a, the address book storage area (address book storage means) 9b, the caller (user) address information storage area 9c, It is divided into a received mail storage area (received mail storage means) 9d, a transmitted mail storage area (transmitted mail storage means) 9e, and the like.

  The address book storage area 9b is provided with a number of address areas as shown in FIG. 3, and each address length area includes the name, telephone number, e-mail address, and encryption of each call partner or e-mail partner. The public key for can be registered (stored). In the sender address information storage area, as shown in FIG. 4, the telephone number of the mobile phone 1, the e-mail address, the secret key used for decrypting the received mail, etc. can be registered (secret key storage means). It has become. The received mail storage area 9d stores the contents of the electronic mail received by the mobile phone 1, and the outgoing mail storage area 9e stores the contents of the electronic mail transmitted from the mobile telephone 1.

  FIG. 2 shows a business card 11 received from a person whom the owner of the mobile phone 1 meets for the first time. As shown in FIG. 2 (a), on the front and back surfaces of the business card 11, the name of the holder of the business card 11, the name of the company and department, the address including the postal code, the telephone number, Personal information such as a FAX number and an e-mail address is recorded in plain text. Also, on the surface of the business card 11, all personal information written in plain text on the surface of the business card 11 is recorded after being converted into a two-dimensional code, for example, a QR code.

Also, two large and small two-dimensional codes are recorded on the back side of the business card 11 as shown in FIG. Among them, the smaller two-dimensional code is encoded with a public key necessary for encryption when an electronic mail is encrypted and transmitted to the holder of the business card 11. In the larger two-dimensional code, all personal information recorded in plain text on the front surface of the business card 11 and a public key that is two-dimensionally encoded on the back surface of the business card 11 are encoded. The two-dimensional code recorded on the back surface of the business card 11 is composed of the same QR code as the two-dimensional code recorded on the front surface.
Here, the QR code of the personal information recorded on the front surface of the business card 11 is the first QR code 12, the QR code of only the public key on the back surface is the second QR code 13, and the QR code representing the personal information and the public key. Will be referred to as a third code 14.

  When registering the information of the holder of the business card 11 in the mobile phone 1, for example, the first QR code 12 is photographed by the camera unit 6. Then, the control unit 2 acquires image information of the first QR code 12 photographed by the camera unit 6, and the image of the first QR code 12 is obtained according to a QR code decoding program stored in a ROM (not shown). Decryption (decoding means), and the personal information of the holder of the business card 11 is registered in one address area. Further, when the second QR code 13 is photographed by the camera unit 6, the public key of the holder of the business card 11 is decrypted in the same manner as described above. Then, the decrypted public key is registered in the address area of the holder of the name card 11 registered earlier by operating the operation unit 8. If the third QR code 13 is decrypted from the beginning, the public key is simultaneously registered as one of the personal information in the address book in addition to the personal information of the holder of the name card 11.

  The registration to the address area will be described with reference to the flowchart shown in FIG. The code reading mode is selected by operating the operation unit 8, and any one of the first to third QR codes 12 to 14 is photographed by the camera unit 6. Then, the control unit 2 takes in the captured image and decodes the QR code (steps S1, S2: decoding means). Next, the control unit 2 determines whether or not the decoded code is the first QR code 12 (step S3), and when the read QR code is not the first QR code 12 (in step S3) If “NO”), the process proceeds to step S 5, where it is determined whether or not the decoded code is the third QR code 14. If the second QR code 13 has been read, the control unit 2 determines “NO” in step S5, proceeds to step S6, and displays the first or third QR code 12 or 14 on the display unit 7. After displaying characters for prompting shooting, the process returns to step S1 and waits for the QR code to be shot.

  If the captured QR code is the first QR code 12, the control unit 2 determines “YES” in step S2, and personal information such as name, address, and e-mail address (not including the public key). .) Is acquired (step S4). When the third QR code 14 is photographed, the control unit 2 becomes “NO” in step S3 and “YES” in step S5, and proceeds to step S7. Here, the personal information including the public key is obtained. get.

  Next, the control unit 2 determines whether or not the acquired personal information is registered in the address book storage area 9b (step S8). When the acquired personal information does not exist in the address book storage area 9b (“NO” in step S8), the control unit 2 proceeds to step S9, and the acquired personal information is stored in the address book storage area 9b. Additional registration is performed in the area (storage control means), and the process proceeds to step S10 to select a public key recording area in the address area of the holder of the business card 11 additionally registered. If the personal information acquired from the QR code has already been registered in the address book storage area 9b ("YES" in step S8), the control unit 2 moves to step S10 and is registered in the address book storage area. The public key recording area in the address area of the holder of the name card 11 is selected.

  Subsequently, the control unit 2 proceeds to step S11 and determines whether or not the public key has been acquired. If the decoded QR code is the first QR code 12, the control unit 2 determines “NO” in step S11, and proceeds to step S12. Here, the display unit 7 displays the second QR code 13 on the display unit 7. A character prompting to shoot is displayed. When the user captures the second QR code 13 based on this display, the control unit 2 decrypts the second QR code 13 to obtain a public key (steps S13 and S14), and the public key is stepped. Register in the area selected in S10 (step S15: public key setting means, storage control means). If the decrypted QR code is the third QR code 14, the control unit 2 determines “YES” in step S11 to determine whether the public key has been acquired, and proceeds to step S15. A public key is registered in the area selected in S10 (step S15).

  The control contents of the control unit 2 when the mobile phone 1 transmits an e-mail will be described with reference to FIG. First, the operation unit 8 is operated to select a new mode for creating outgoing mail (step A1), and the other party to be sent is selected from the address book storage area 9b. Then, the control unit 2 reads out the name of the transmission partner and the electronic mail address thereof and writes them in the address part of the transmission mail (step A2). Next, when the user operates the operation unit 8 to create a mail text, the control unit 2 accepts the mail text (step A3). Next, when the user selects encryption by the operation unit 8, the control unit 2 becomes “YES” in Step A4, and proceeds to the next Step A5.

  In step A5, the control unit 2 determines whether or not the public key of the transmission partner is registered in the address book storage area 9b. When the public key is registered (“YES” in step A5), the control unit 2 encrypts the mail text using the public key (step A9: encryption means). When the public key of the transmission partner is not registered in the address book (“NO” in step A5), the control unit 2 displays the fact on the display unit 7 and notifies the user (step A6). Therefore, when the user captures the second QR code 13 of the business card 11 of the transmission partner with the camera unit 6, the control unit 2 acquires the public key by decrypting the captured image (step A7).

  Then, the control unit 2 registers the decrypted public key as the transmission partner's public key in the address area of the transmission partner in the address book storage area 9b (step A8: public key setting means, storage control means), and the disclosure thereof. The outgoing mail is encrypted using the key (step A9). Thereafter, when the user selects “Send” by the operation unit 8, the control unit 2 transmits the encrypted electronic mail to the electronic mail address of the transmission partner (step A 10), and the transmission mail is stored in the storage unit 9. Is stored in the outgoing mail storage area 9e (step A11). At this time, the mail transmitted after being encrypted is also stored as being encrypted mail. The encrypted transmission mail is decrypted by the transmission partner's private key in a terminal device such as a mobile phone of the transmission partner.

  Next, the control contents of the control unit 2 when the mobile phone 1 receives an e-mail will be described with reference to FIG. When the electronic mail is received (step B1), the control unit 2 determines whether or not the received electronic mail is encrypted (step B2). If it is not encrypted (“NO” in step B2), the control unit 2 stores the received mail in the received mail storage area 9d (step B3) and displays the contents of the received mail on the display unit 7 (step B3). Step B10).

  On the other hand, when the received mail is encrypted (“YES” in step B2), the control unit 2 stores the received mail in the received mail storage area 9d (step B4). At this time, the fact that it is an encrypted mail is also stored at the same time. Next, the control unit 2 determines whether or not a secret key is registered in the sender address information storage area 9c (step B5). If the secret key is registered (“YES” in step B5), the control unit 2 decrypts the received mail using the secret key to make plain text (step B9: decryption means). If the secret key is not registered ("NO" in step B5), the control unit 2 displays the fact on the display unit 7 and notifies the user (step B6). Therefore, when the user inputs his / her secret key (step B7), the control unit 2 registers the secret key in the sender address information storage area 9c (step B8) and receives it using the secret key. The mail is decrypted (step B9). After decrypting the received mail encrypted as described above, the control unit 2 displays the received mail on the display unit 7 (step B10).

  When it is desired to display an e-mail transmitted in the past or an e-mail received in the past on the display unit 7, the operation unit 8 is operated to display a transmitted mail display mode as shown in FIG. 5A or 6A. Alternatively, the received mail display mode is selected. Then, as shown in FIG. 5B or FIG. 6B, the control unit 2 displays a list of e-mails transmitted or received in the past on the display unit 7 (display control means). In this case, the control unit 2 displays the encrypted electronic mail so that it can be seen at a glance that it is encrypted with a key mark. When the user selects a mail to be displayed from the list, the control unit 2 displays the selected mail on the display unit 7. In this case, since the encrypted electronic mail is marked with a key mark, it can be readily seen that even if it is displayed on the display unit 7 as it is, it is not displayed in plain text.

The present invention is not limited to the embodiment described above and shown in the drawings, and can be expanded or changed as follows.
You may make it record the 1st thru | or 3rd QR code 12 thru | or 14 on the surface of a business card like FIG. 10 which shows other embodiment.
The two-dimensional code is not limited to a QR code.
The terminal device is not limited to a mobile phone, and may be a personal computer, a PDA (Personal Digital Assistants), or the like.
The first to third two-dimensional codes may be different two-dimensional codes.

1 is a block diagram of a mobile phone according to an embodiment of the present invention. A diagram showing both front and back sides of a business card Conceptual diagram showing the contents stored in the address book storage area of personal information of the other party Conceptual diagram showing the stored contents of personal information in the sender address information storage area (A) is a diagram showing a screen for selecting received mail display, (b) is a diagram showing a list of received mail (A) is a diagram showing a selection screen for outgoing mail display, (b) is a diagram showing a list of outgoing emails Flow chart showing control contents when reading two-dimensional code Flow chart showing control contents when sending mail Flow chart showing control contents when receiving mail The figure which shows other embodiment of a business card

Explanation of symbols

  In the drawings, reference numeral 1 denotes a camera-equipped mobile phone (terminal device), 2 denotes a control unit (decryption means, public key setting means, encryption means, storage control means, display control means, decryption means) 3 denotes a wireless communication unit (communication) Means), 6 is a camera unit (photographing unit), 7 is a display unit (display unit), 8 is an operation unit, 9 is a storage unit, 9b is an address book storage area (address book storage unit), and 9c is a sender. Address information storage area (secret key storage means), 9d is a received mail storage area (received mail storage means), 9e is an outgoing mail storage area (outgoing mail storage means), 11 is a business card, 12 to 14 are first to third QR codes (first to third two-dimensional codes).

Claims (10)

In a business card that records personal information in plain text, including the name, address and email address of the holder,
A first two-dimensional code representing the personal information of the right holder,
A second two-dimensional code representing the public key of the right holder used when the sender encrypts e-mail information to be sent to the right holder by a public key method ;
A business card, in which a third two-dimensional code representing both the personal information of the holder and the public key is recorded. The business card of claim 1,
Each of the two-dimensional codes is the same type of two-dimensional code . The business card according to claim 1 or 2,
The first two-dimensional code is recorded on a surface in which the personal information of the right holder is recorded in plain text,
A business card, wherein the other two-dimensional codes other than the first two-dimensional code are recorded on another surface . A communication means for sending and receiving e-mails via a communication network;
Imaging means for imaging the two-dimensional code recorded on the business card according to claim 1,
Decoding means for decoding the two-dimensional code imaged by the imaging means;
When the e-mail information transmitted to the holder of the business card is encrypted by a public key method, the second two-dimensional code recorded on the business card is photographed by the photographing means and decrypted by the decrypting means , Public key setting means for setting the decryption information as a public key,
Encryption means for encrypting information to be transmitted by the e-mail using the set public key;
A terminal device comprising: The terminal device according to claim 4, wherein
Address book storage means for storing the personal information of a plurality of persons in respective address areas;
Storage control means for storing the decoded information in the address area of the address book storage means when the first two-dimensional code recorded on the business card is photographed by the photographing means and decoded by the decoding means; terminal device characterized by comprising an br />. The terminal device according to claim 4 or 5,
When the second two-dimensional code recorded on the business card is photographed by the photographing means and decrypted by the decrypting means, the public key as the decryption information is used as the name card holder of the address book storage means. A terminal device comprising storage control means for storing the address information as one piece of personal information in the address area . The terminal device according to claim 4 , wherein
Storage means for address book for storing the personal information of a plurality of persons;
Storage control means for storing the decoded information in the address area of the address book storage means when the third two-dimensional code recorded on the business card is photographed by the photographing means and decoded by the decoding means;
Terminal device characterized by comprising a. The terminal device according to any one of claims 4 to 7 ,
Outgoing mail storage means for storing outgoing outgoing mail information;
Display means for displaying a list of the sent mail information stored in the sent mail storage means;
A display control unit that displays encrypted transmission mail information separately from other transmission mail information when displaying the list of transmission mail information on the display unit; apparatus. The terminal device according to any one of claims 4 to 8,
A secret key storage means for storing the secret key of the owner of the terminal device used for decrypting the received mail information encrypted when the received e-mail information is encrypted by the public key method;
Decryption means for decrypting the encrypted received mail information using the secret key;
Terminal apparatus characterized by a display means for displaying the decoded received mail and a <br/>. The terminal device according to claim 9 , wherein
Received mail storage means for storing received email information;
Display means for displaying a list of the received mail information stored in the received mail storage means;
Display control means for displaying encrypted received mail information separately from other received mail information when displaying a list of the received mail information to be displayed on the display means. Terminal device to do.

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