JPS6031376B2 - Document issuing method - Google Patents

Description

[Detailed Description of the Invention] This invention is applicable to official documents such as resident cards, train tickets, theater tickets, etc. (hereinafter, these are collectively referred to as official documents).

) relating to a document issuance method for issuing documents by facsimile transmission. Conventionally, in order to give certified documents authenticity or value, methods have been used, such as giving special characteristics to the paper used for documents, applying special printing, or stamping them with a seal.

For this reason, there is a restriction that these documents can only be obtained in very limited places.

This was especially true in the case of official documents such as residence certificates, which were issued only at the government office where the original was kept, making it extremely inconvenient to have to travel to the office to obtain the document.
For this reason, it has recently been considered that certified documents can be easily obtained from any location by issuing them using facsimile.

However, since documents issued using facsimile are extremely easy to copy, it is extremely dangerous to provide them with authentication and value as is.

In order to provide authenticity and value to such documents, for example, in order to be able to separately inquire about the contents of a facsimile image, an inquiry form consisting of the name of the issuing organization of the authorized document, date of issue, document number, document content, etc. is provided. Information is recorded in a specific area of the facsimile recording paper, and this information is checked by a special terminal installed at the issuing counter to determine whether it is genuine or fake, or by theft or copying of official documents. In order to prevent unauthorized use by a third party, for example, encryption information consisting of multiple digits known only to the recipient is recorded in a specific area of the facsimile recording paper in the same way as described above, and is similar to a cash card in a bank's online system. At the time of use, unauthorized use is prevented by checking the code stored in the user's memory and the code recorded in the facsimile record.

In this case, such inquiry information and encryption information (hereinafter collectively referred to as appraisal information).

) Barcodes are often used for recording. That is, as an example, the logic level of the digitally encoded appraisal information shown in FIG. 1b is converted into a bar code using one period of the clock signal shown in FIG. A method has been considered in which the authentication information is reproduced by recording the bar code on the bar code and then reading the bar code in synchronization with the same clock signal as the above clock signal. However, if the facsimile record expands or contracts due to humidity, the barcode on the record will also expand or contract, and the clock signal and barcode reading will not be synchronized during playback, resulting in the loss of identification information. The playback may not be accurate.

Therefore, in order to eliminate the effects of expansion and contraction of the facsimile recorded material, the clock signal shown in Figure 2a and the authentication information shown in Figure 2b are converted into barcodes and recorded on the facsimile recorded material as shown in Figure 2c, and then A method of reproducing information by reading an information barcode using a barcoded clock signal on recording paper has also been considered.

However, in this case, the bar code occupies a larger area on the facsimile recording paper, which reduces the area for recording the facsimile image, and furthermore, the head for reproducing information and reproducing clock signals during playback is Since this is necessary, the configuration becomes more complicated and expensive.

This invention was made to solve the above problems, and it is possible to obtain issued documents using facsimile transmission, and to record the appraisal information, the clock signal is modulated with digitally encoded appraisal information. The object of the present invention is to provide a document issuance method that can provide highly reliable authentication or value by using barcodes.

An embodiment of the present invention will be described below with reference to the drawings.

First, the document issuing institution sends the facsimile receiving terminal a third
As shown in the figure, authentication information and control information are sent as time-series signals along with encoded facsimile image information corresponding to the content of the document.

In response to this, the facsimile terminal writes the appraisal information into the storage device 1 as shown in FIG.

The appraisal information written in this storage device 1 is sequentially read out. As a result, the converter 2 receives the read enable signal, reads the verification information from the storage device 1, and generates the verification image information to be recorded in a facsimile via the verification information encoder and modulation section. In this case, the image information for identification consists of something modulated by a clock signal and information for identification and converted into a barcode, for example, the frequency of the clock signal shown in Figure 5a and the digitally encoded identification information shown in Figure 5b. When the logic level of the authentication information is "1", one period of the clock signal is used, and when the logic level of the authentication information is "0", one period of the clock signal divided by two is used as the barcode. The signal is generated as a signal (c in the same figure), thereby obtaining a bar code shown in d in the same figure on the facsimile recording paper.

Here, the modulation circuit that modulates the clock signal with the authentication information is an AND gate 5 and an OR gate 6 shown in FIG.
and 2 frequency divider 7. That is, in the case shown in the figure, the clock signal shown in FIG. 7a is input to one input terminal of the OR gate 6, and the clock signal shown in FIG. information is input to the AND gate 5, and the AND output is given to the other input terminal of the OR gate 6, and from this OR gate 6, a modulation signal of double frequency shown in d of the same figure is obtained, which is sent to the frequency divider by 2. 7, a modulated signal shown in e of the figure is obtained. On the other hand, returning to FIG. 4, in the converter 2, the control information encoder generates a control signal based on the length in the sub-scanning direction corresponding to the recording area (main scanning direction) of the authentication information and the amount of information read.

Further, the editing device layer 3 compares the magnitude relationship between the sub-scanning position and the control signal, and in the main-scanning direction, a switching circuit switches output of the authentication information and facsimile image information to the recording head 4. Furthermore, in the sub-scanning direction, a read enable signal for reading the next information from the recording device 1 is output. As a result, facsimile image information 9 is recorded in the center of facsimile recording paper 8, as shown in FIG. This record will then be issued as a notarized document.

The document issued in this way is read with the authentication information reproduced by a dedicated terminal, but the reproduction method at this time is to Detects the inversion from white or from white to black, and thereby divides the original clock signal by two.
1/8, 3/8, 5/8, 7/8 from the rising or falling edge of this clock signal.
The logic level of the signal at the time when the signal is delayed by the period is detected, and if the level at this time continues as "0", "1", or "1" and "0", it is determined to be "1", and If it is "1", it is determined to be "0", and the verification information is demodulated and reproduced.

Of course, the demodulation circuit at this time is also AND gate, OR gate 2.
This can be achieved using a frequency divider, etc. Therefore, if the verification information for this mushroom is verification information consisting of the name of the issuing organization, date of issue, document number, document content, etc., the information read into the dedicated terminal will be mixed with the issuer of the document. Authenticity and fakeness can be determined.

Further, if the information is for encryption, unauthorized use of the document by a third party can be prevented by comparing it with the code stored by the user. Thus, according to this document issuance system, authorized documents can be issued using facsimile transmission, so documents can be obtained by customers at any location.

In addition, since the clock signal is modulated with digitally encoded identification information and converted into a bar code to record the identification information, the logical level of the conventional identification information can be changed to one cycle of the clock signal as the minimum unit. Compared to encoded information, the authentication information can always be stably reproduced regardless of the expansion and contraction of the facsimile recording paper due to moisture, etc., and this provides highly reliable authentication or value. Furthermore, compared to the conventional system in which clock signals and authentication information are converted into barcodes, a wider area can be used to record facsimile images, and only one playback head is needed.
Since it can be made into individual units, the structure of the apparatus employing this method can be simplified and the cost can be reduced. In the above embodiment, as a method of modulating the clock signal with the authentication information, the frequency of the clock signal and the beat rate of the digitally encoded authentication information are made to match, and when the logic level of the authentication information is "1", the clock signal is modulated with the authentication information. One period of the signal is also set to “0”.
9, half-cycles of the clock signal divided by 2 are generated as barcode signals, and these are, for example, digitally encoded as shown in FIG. 9b for the clock signal shown in FIG. 9a. The logical level of the appraisal information is “1”
When the logic level is "0", one period of the clock signal is generated, and when the logic level is "0", one period of the inverted clock signal is generated as a barcode signal [Fig. After that, during playback, detect the inversion of the barcode shown in FIG. 9d from black to white or from white to black corresponding to the falling edge of the clock signal shown in FIG. 9a, As a result, the clock signal shown in figure e, which is the original clock signal divided by two, is extracted,
The logic level of the signal before and after the rise and fall of this clock signal is detected, and the level at this time is ``0'' or ``1''.
”, it is determined to be “1”, and if it is “1” or “0”, it is determined to be “0”, thereby demodulating and reproducing the authentication information.

Furthermore, in the above description, a storage device, a conversion device, an editing device, etc. are added in order to modulate the appraisal information into an image signal and superimpose it on the facsimile image information, but these functions can also be executed by a calculation device using a microcomputer, for example. It is. In addition, the present invention is not limited to the above-mentioned embodiments, but can be implemented with appropriate modifications without changing the gist. As described above, according to the present invention, a statement of issue can be obtained by using facsimile transmission, and moreover, a bar code in which a clock signal is modulated with digitally encoded appraisal information is used to record the appraisal information. It is possible to provide a document issuance method that provides highly reliable authentication or value.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams for explaining the conventional method of recording appraisal information, respectively. FIG. 3 is a diagram showing a facsimile transmission signal in an embodiment of the present invention, and FIG. 4 is a diagram showing a facsimile transmission signal in an embodiment of the present invention. FIG. 5 is a block diagram showing a receiving terminal, FIG. 5 is a diagram for explaining the conversion of appraisal information into a bar code in the same embodiment, and FIGS. 6 and 7 are diagrams showing a modulation circuit for appraisal information used in the same embodiment. 8 is a diagram showing an official document recorded on facsimile recording paper, and FIG. 9 is a diagram for explaining another example of converting appraisal information into a bar code. This is a diagram. 1... Recording device, 2... Conversion device, 3...
...Editing device, 4...Recording head, 5...
...and gate, 6...or gate, 7
...2 Frequency divider, 8...Facsimile recording paper, 9...Facsimile image information, 10...
...Information for appraisal. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. Recording facsimile image information, which is the content of a document, on a facsimile record by facsimile transmission, and image information for authentication, which is converted into a barcode by modulating a clock signal with digitally encoded authentication information. The document issuance method is characterized in that this recorded material is issued as an official document and, if necessary, a clock signal and verification information can be separated and reproduced from the verification image information on the recorded material. 2 The above-mentioned image information for verification is one cycle of the clock signal when the logic level of the digitally encoded verification information is 1 or 0, and half a cycle of the clock signal divided by two when the logic level is the other one. 2. The document issuing method according to claim 1, wherein each document is converted into a bar code. 3 The above-mentioned image information for authentication is one cycle of the clock signal when the logic level of the digitally encoded authentication information is 1 or 0, and one cycle of the inverted clock signal when the logic level is the other. 2. The document issuing method according to claim 1, wherein the document issuance method is converted into a bar code.