JP2004172852A - Apparatus for transmitting image with electronic signature - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for transmitting an image with an electronic signature capable of securely transmitting corresponding data attached to an image such as a photographing date and time, a photographer, or a photographing apparatus code. <P>SOLUTION: A mobile transmission apparatus including a digital camera is provided with: an image photographing means; a text information entry means; a cross-referencing means for cross-referencing image information to text information; an encryption means for encrypting both the image information and the text information; an electronic signature attaching means for attaching an electronic signature to the image information and the text information; a transmission means for transmitting the image information, the text information and the electronic signature that are encrypted; an information storage means for storing at least the transmitted information; and a program for executing each means. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image transmitting apparatus with an electronic signature that transmits image information transmitted from a portable terminal in a state where it cannot be tampered with.
[0002]
[Prior art]
In recent years, digital cameras with communication means and mobile phones with digital cameras have been used on a daily basis.
However, in some cases, since the image can be easily photographed and transmitted, the transmitted image is freely diverted by the receiving side, which may cause copyright and portrait rights problems.
In addition, the transmitted image was downloaded to a personal computer or an image correction terminal for a digital image, and the receiver was free to make corrections.
For example, when an image transmitted as a proof photograph is copied and used, the content of the transmitted image may have been falsified, and thus the valuable proof photograph cannot be used as the proof photograph That situation occurs.
In addition, a situation may occur in which the photographing time, photographer, and photographing location are falsified during transmission and cannot be used as a proof photograph.
[0003]
Therefore, a technique has been disclosed in which, when a document image is converted into document data, an area, a hierarchy, and the like included in the document data are individually encrypted and decrypted.
This technology is described as an information processing apparatus that divides a document image into objects and enables encryption for each object (see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-2002-318535
[Problems to be solved by the invention]
The prior art is directed to an information processing apparatus such as a computer and a server including a copier, a facsimile, and a scanner, and is not directed to a mobile communication terminal having immediacy.
In addition, the sender's judgment classified the transmission information into a part to be encrypted and a part not to be encrypted, so that important information not selected by the sender was not encrypted, and contained the danger of being tampered with during transmission. .
[0006]
[Means for Solving the Problems]
According to an aspect of the present invention, there is provided a portable transmitting apparatus having a digital camera, comprising: an image photographing unit; a text information input unit; Associating means for associating information with text information; encrypting means for arranging and encrypting image information and text information; electronic signature attaching means for attaching an electronic signature to image information and text information; and encrypted image A transmission means for transmitting information, text information and an electronic signature, an information storage means for storing at least the transmitted information, and a program for executing each of the means.
[0007]
According to a second aspect of the present invention, in the first aspect of the present invention, the image information is rendered untamperable before encrypting the image information and the text information side by side.
[0008]
According to a third aspect of the present invention, in the first or second aspect, the text information includes at least a photographing date and time and an identification code of a sender.
[0009]
According to a fourth aspect of the present invention, in the first aspect of the present invention, the text information includes at least a photographing date and time and an identification code of the image transmitting apparatus. It is.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of an image transmitting apparatus with an electronic signature according to the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a system according to an embodiment of an image transmitting apparatus with an electronic signature of the present invention. FIG. 2 is a block diagram showing main components inside the image transmitting apparatus with an electronic signature of the present invention. FIG. 3 is a block diagram showing a component configuration around the imaging unit, and FIG. 4 is a diagram for explaining an embodiment of an image information transmission procedure using the electronic signature-added image transmission device of the present invention.
[0011]
With reference to FIG. 1, the configuration of a system according to an embodiment of an image transmitting apparatus with a digital signature according to the present invention will be described.
A system according to the present invention is a portable image transmission device (hereinafter, referred to as a portable communication terminal) 1 for capturing an image and transmitting image data, at least image identification data (text data), and transmission data 3 including an electronic signature. And a plurality of mobile phones 10 for receiving transmission data and a plurality of servers 2.
The portable communication terminal includes a portable telephone, a portable terminal called a PDA (Personal Digital Assistant), a wristwatch, and the like.
Further, the mobile phone includes a mobile phone having an imaging unit and a mobile phone not having an imaging unit.
Therefore, as a preferred embodiment of the present invention, the following description will be made with an example of a mobile phone having an imaging unit.
[0012]
The mobile phone 1 shown in FIG. 1 includes an imaging unit 11, an input unit 12, and a display unit 13 on the display unit side. Depending on the type of mobile phone, an imaging unit may be provided on the back side of the display unit 13.
The input / output unit 12 includes the imaging unit 11, a speaker unit (not shown), a microphone unit, and operation keys.
The operation key unit includes, for example, a power key, a numeric key for inputting a telephone number, an alphabet for inputting an e-mail, a kana key, a function key, a shutter of an imaging unit, and the like.
[0013]
When the holder of the mobile phone 1 captures an image of the subject using the imaging unit 11, the captured image is displayed on the display unit 13 with a file number assigned. By pressing a predetermined function key, the image is temporarily recorded in the recording unit and stored.
[0014]
Select the destination address from the address book and copy it to the destination frame. Press the carriage return key and enter the message in the message input box. The photographic image to be transmitted is extracted from the image file by the image name or the image number and attached to the address. When the send button is operated, depending on the shooting date, time, and phone model, data such as the latitude and longitude of the location where the image was taken is automatically attached to the image, and the entire image and image data are tampered with. Preventive measures are taken.
[0015]
In the falsification prevention process, an image and image corresponding data corresponding to the image are grouped by a certain command, for example, a command using a unique number or symbol stored in a mobile phone. The receiving mobile phone 10 or the server 2 cannot separate the above-mentioned image from the image-corresponding data unless it has a group release command.
Therefore, the separated image cannot be falsified, nor can the corresponding data attached to the image be altered. If there is a special release request from the receiving side, a command for group release may be disclosed from the transmitting side to the receiving side.
By taking measures to prevent falsification of the transmitted image in this way, the transmitted image can be protected from falsification and infringement of portrait rights and copyrights.
[0016]
With reference to FIG. 2, the outline of the component configuration and component functions of the image transmitting apparatus with a digital signature (mobile phone) of the present invention will be described.
The imaging unit 11, the input / output unit 12, the display unit 13, and the transmission unit (transmission / reception unit) 14 shown in FIG. 2 are incorporated so as to be partially exposed on the surface of the exterior panel.
Further, a CPU 100, a ROM 101, a RAM 102, a recording unit (information storage unit) 103, a voice conversion circuit unit 104, a clock unit 105, and the like are incorporated in the telephone as built-in components.
[0017]
First, components around the imaging unit 11 and their roles will be described with reference to FIGS.
3, a captured image of a subject captured by the imaging unit 11 is converted into an image signal by the CCD 300.
The DSP / CPU 303 as a control unit controls a digital image signal and controls the imaging unit 11.
The control unit DSP / CPU 303 is connected to a TG (Timing Generator) 302 for driving the CCD 300, and the TG 302 is connected to the CCD 300 and a unit circuit 301.
The unit circuit 301 includes a CDS for temporarily storing and storing an input image signal, a gain adjustment amplifier AGC for amplifying the image signal, and an A / D converter AD for converting the amplified image signal into a digital image signal. ing.
The output signal of the CCD 300 is sent as a digital signal to the DSP / CPU 303 as a control unit via the unit circuit 301.
[0018]
In addition to the unit circuit and the CCD, the control unit DSP / CPU 303 has a display unit 309 including an LCD and its driving circuit, and inputs such as a shutter button for outputting an input signal to the DSP / CPU 303, a plurality of operation keys, and a power key. The unit 308 and the communication unit 310 are connected.
Further, a recording unit 307 including a flash memory such as an I / O port 305, a RAM 306, and an EEPROM is connected via an ADB (Address Data Bus) 304.
[0019]
The I / O port 305 is an interface for outputting image data and the like converted into a serial signal by the control unit DSP / CPU 303, and mainly outputs image data stored by being connected to an external recording medium or an external terminal. Or, conversely, fetch necessary data from an external terminal.
[0020]
The RAM 306 temporarily stores, for example, digitized image data captured by the CCD 300 when the shooting standby mode is set, and is also used as a buffer memory of the control unit DSP / CPU 303.
[0021]
The recording unit 307 stores an operation program of the control unit DSP / CPU 303, various data used for controlling each unit, and transmission data including various images, reception data, history data, and the like.
[0022]
The control unit DSP / CPU 303, the RAM 306, the recording unit 307, and the aforementioned program memory ROM may be substituted by the CPU 100, the RAM 102, the recording unit 103, and the ROM 101 shown in FIG.
In addition, an independent ROM may be mounted as a memory for supplying the operation program for the control unit DSP / CPU 303 and various data used for controlling each unit.
The input unit 308, the display unit 309, and the communication unit 310 in FIG. 3 will be described using the input / output unit 12, the display unit 13, and the transmission / reception unit 14 in FIG.
[0023]
The input / output unit 12 in FIG. 2 includes an imaging unit 11, a speaker unit and a microphone unit (not shown), operation keys, and the like.
The operation key unit includes, for example, a power key, a numeric key for inputting a telephone number, an alphabet for inputting an e-mail or the like, a kana key, a function key, a shutter of an imaging unit, and the like.
[0024]
The display unit 13 composed of a liquid crystal or the like includes an LCD (Liquid Crystal Display) and its driving circuit, and displays character information and image information.
[0025]
The transmission / reception unit 14 executes a communication control sequence based on a communication protocol with a base station (not shown), and transmits and receives audio data, image data, text data and other various data signals, and control signals.
[0026]
The voice conversion circuit unit 104 controls processing of a voice signal (not shown) input from a microphone, a voice signal output to a speaker, and the like.
[0027]
The clock unit 105 outputs, to the CPU 100, data on the date, time, and the like when the above-described image was captured, and the date, time, and the like when data was transmitted and received from the mobile phone.
[0028]
The ROM 101, the RAM 102, the recording unit 103, the input / output unit 12, the display unit 13, and the transmission / reception unit 14 shown in FIG. 2 partially overlap the description in FIG.
[0029]
The ROM 101 stores an operation program of the CPU 100 as a control unit, a communication processing program, and various programs used for controlling each unit.
[0030]
The RAM 102 temporarily stores data when the standby mode is set, and functions as a buffer memory of the CPU 100. It may be used as temporary storage of digitized image data captured by the CCD (300).
[0031]
The recording unit 103 stores an e-mail received from an external communication terminal or the like, an already-transmitted e-mail, an e-mail suspended for transmission, photographed image data, and corresponding data.
The memory used for the recording unit is an electrically erasable non-volatile memory that retains stored data even when a power supply such as an EEPROM is in an off state or when a battery is replaced.
[0032]
With reference to FIG. 4, one embodiment of an image information transmitting procedure using the image transmitting apparatus with a digital signature according to the present invention will be described.
First, in a first step (hereinafter referred to as S), the mobile communication terminal 1 obtains a public key, a private key and a digital certificate or a public key certificate forming a pair from a certification authority called CA (Certification Authority). (S1).
This digital certificate is a public key that is disclosed to the recipient side so that the transmitted image is not intercepted and falsified when the digital image is transmitted to a branch office or head office by a reporter of a newspaper company or a photographer during coverage, for example. Is for encrypting the image.
In general, a public key and a secret key of the public key cryptosystem are used, but in the case of the above-described newspaper company or the like, encryption may be performed using a strictly managed common key.
In the case of this common key, in the communication between the company and the employee, and between the company and the employee, for example, the image transmission device lent to the employee through the company net of the company or the group is incorporated without notifying the employee. be able to.
Also, when a common key is used, there is an advantage that the company can freely change the key periodically.
[0033]
The owner of the mobile communication terminal or the administrator obtains and stores the public key in advance, and an electronic certificate for certifying it, a private key to a mobile communication terminal such as a mobile phone having an imaging unit, The data is stored so as not to be read (S2).
[0034]
Next, the subject is photographed by the imaging unit of the portable communication terminal in which the electronic certificate and the secret key are stored (S3).
The captured image is processed into a state in which it cannot be falsified by a special command of the mobile communication terminal (S4). As described above, the special command may be the machine number of the mobile communication terminal, or a special symbol group or a secret key defined by a company or an organization.
The fixed image is attached with the date and time when the image was taken, the device number where the image was taken, and in some cases latitude and longitude information.
The processed image is stored in the mobile communication terminal in association with an image search code or a search message (image name).
[0035]
Character information relating to the image is input on the text information input screen of the communication portable terminal (S5). The inputted mobile communication terminal unique code and at least date information are automatically attached to the character information (S6).
Here, the above-mentioned temporarily stored image information is called out and encrypted with a secret key stored in the recording unit of the portable communication terminal together with the above-mentioned character information (S7).
The hash value of the image information and character information is encrypted and attached as an electronic signature (S8).
An electronic signature is attached to the encrypted character information including an image and transmitted to the transmission destination (S9).
[0036]
In the above-described series of explanations, the method of fixing the image information including the corresponding information in order to protect the image information from tampering has been described. However, there is a case where it is not necessary to fix image information including correspondence information between an editorial department of a company having a trust relationship and a reporter in order to prevent tampering. In such a case, only encryption processing for preventing wiretapping and tampering during transmission may be performed.
[0037]
The operations of disabling tampering in S4, inputting date information in S6, encrypting in S7, and creating a digital signature in S8 are automatically performed in the portable communication terminal in synchronization with the input steps S3 and S5.
[0038]
【The invention's effect】
By using the image transmitting apparatus with the electronic signature of the present invention, the sender who transmits the image and the receiver who receives the image can enjoy the following advantages. 1) It is possible to safely transmit corresponding data attached to an image, for example, a photographing date and time, a photographer, or a photographing device code. That is, in the case of tampering, it can be transmitted by attaching an electronic signature so as to leave evidence of tampering.
2) The transmitted digital image can be protected from tampering by the image fixing process at the time of shooting or the electronic signature performed at the time of transmission.
3) In the case of a device that can transmit at the same time as shooting, it is proved that the image has not been tampered with the time records of the sender and the receiver, and the credibility of the image can be improved. In addition, by attaching accurate time data and data of a shooting place by the GPS function, the value as an evidence photograph can be enhanced.
As a result, it can be effectively used for news photographs, crime scene photographs, and the like of newspaper companies and magazine companies that require accuracy and speed.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a system according to an embodiment of an image transmission device with an electronic signature of the present invention; FIG. 2 is a block diagram showing main components inside an image transmission device with an electronic signature of the present invention; 3 is a block diagram showing the configuration of parts around the imaging unit. FIG. 4 is a diagram for explaining an embodiment of an image information transmission procedure using the image transmission apparatus with an electronic signature of the present invention.
DESCRIPTION OF SYMBOLS 1 Image transmission apparatus with electronic signature 2 of this invention 2 Server 3 Transmission data 10 Other mobile telephones 11 Imaging part 12,308 Input part 13,309 Display part 14 Transmission / reception part 100 CPU
101 ROM
102,306 RAM
103, 307 Recording unit 104 Voice conversion circuit unit 105 Clock unit 300 CCD
301 Unit circuit 302 Timing generator 303 Control unit 304 Address data bus 305 IO port

Claims (4)

A portable transmission device having a digital camera,
Image photographing means, text information input means, associating means for associating image information and text information, encryption means for arranging and encrypting image information and text information, and attaching an electronic signature to the image information and text information Electronic signature attaching means, transmitting means for transmitting encrypted image information, text information and an electronic signature, information storing means for storing at least the transmitted information, and a program for executing each of the means. An image transmitting apparatus with an electronic signature. 2. The image transmitting apparatus with an electronic signature according to claim 1, wherein the image information is rendered falsified before the image information and the text information are arranged and encrypted. 3. The image transmitting apparatus with an electronic signature according to claim 1, wherein the text information includes at least a photographing date and time and an identification code of a sender. 3. The image transmitting apparatus with an electronic signature according to claim 1, wherein the text information includes at least a photographing date and time and an identification code of the image transmitting apparatus.

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