JPH0343883A - Security system - Google Patents

Abstract

PURPOSE:To prevent an ID card, a cash card, or the like from being forged and to detect a forgery by providing a picture data acquiring means, a picture conversion processing means, and a storage means. CONSTITUTION:A print data generating means consists of a picture data acquiring means 12 which acquires picture data, a picture conversion processing means 14 which subjects picture data obtained from this picture data acquiring means 12 to pattern conversion processing to obtain secret information, and a storage means 16 where converted data from the picture conversion processing means 14 is stored as print data to a printed matter. Thus, it is difficult to detect the conversion processing to which print information of the printed matter is subjected, and its regularity cannot be recognized to effectively prevent foregery. On the check side, printed contents of the printed matter are recognized as picture data in accordance with a preliminarily determined rule and are subjected to inverse conversion to check whether it is the real or not.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a security system that is effective in preventing forgery of ID cards, cash cards, etc., and detecting forgeries.

(Prior Art) In various card systems such as ID cards and cash cards, code information such as a bank or credit company code, a purpose code, a personal code, etc. is written on the magnetic stripe of these cards. There is.

Normally, an individual is identified by a series of codes on the magnetic stripe and a PIN number, but it is possible to decode the code information on the magnetic stripe of these cards with a code reader, forge the card, and discover the PIN number. This would allow fraudulent transactions to take place.

(Problems to be Solved by the Invention) As described above, in conventional card systems, the code information on the magnetic stripe of the card can be easily read, so cards are constantly counterfeited and security is insufficient.

Therefore, an object of the present invention is to provide a security system in which counterfeiting of canids is difficult.

[Structure of the Invention] (Means for Solving the Problems) The present invention creates print data for printing on a printed matter by a print data creation means and stores it in a storage means, and causes the print data creation means to generate print data according to the print data. In the inspection system, the printed matter includes confidential information contained in the printed matter, and the presence or absence of the information contained in the printed matter is checked by an inspection device, the print data creation means is configured as an image data acquisition means for acquiring image data;
Image conversion processing means for performing pattern conversion processing on the image data obtained from the image data acquisition means to obtain the above information, and storage means for storing the converted data from the image conversion processing means as print data on printed matter. It consists of:

(Function) By the above means, it is difficult to understand what kind of conversion process the print information of printed matter has undergone, and the regularity can be detected even in the case of counterfeiting, which is effective in preventing counterfeiting. The inspection side can check whether the printed matter is genuine or fake by capturing the printed content of the printed matter as image data and inversely converting it according to predetermined rules.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

(5) FIG. 1 shows an embodiment of this invention. 11th ffl...
+Here, 11 is an image medium such as a picture, a photo, a single character, or a symbol that is printed as confidential information on the cash card.
Here, a facial photograph is used as the image medium. Image data of this subject is acquired by, for example, a video camera 12A or an image scanner 12B.

The image data from this image data acquisition means is input to the image conversion processing device 14 of the image data processing device 13.

The image transformation processing device 14 performs, for example, -dimensional Fourier transformation or two-dimensional Fourier transformation processing on input image data under the control of the microcomputer 15 . The converted image data (that is, the confidential information converted to frequency domain data) is stored in the print data memory 16. The print data memory 16 is used in a print data processing section of the printing device 17.

As a result, the printing device 17 prints the hidden image information on the surface of the cash card on which the magnetic stripe storing the code information is printed.

The determination is made based on the code information on the magnetic stripe of the second card 21 and the password. Next, an image of the cash card 21 is captured by, for example, a video camera 22, and the printed content is obtained as image data. The image data (including confidential information) acquired by the video camera 22 is transferred to the image conversion processing device 2
3, and undergoes one-dimensional or two-dimensional inverse Fourier transform processing according to predetermined rules. As a result, if confidential information is included, the image conversion processing device 23
From this, image information of the same pattern (image of the image medium 11) as the image acquired by the video camera 12A can be reproduced.

The image data of the image medium 11 reproduced in this manner is displayed on the monitor 24 and monitored by human eyes. Alternatively, image data from the image conversion processing device 23 is input to the check device 25.

This check device 25 performs a comparison process between the image data from the image conversion processing device 23 and image data of a pattern stored in advance, and determines whether or not the patterns match with a certain tolerance. I do. Alternatively, the face of the person who brought the cash card can be captured using the second camera 2.
7, the image processing device 2B performs image processing, and a check device performs comparison processing with image data from the image conversion processing device 23 to judge the image.

The determination output is input to the message device 26. When the message device 26 receives the match determination signal,
If a printed matter is accepted or a mismatch determination signal is input, a rejection warning is generated or displayed.

FIG. 2 shows an example of the internal configuration of the image conversion processing device 23.

The image signal from the video camera 22 is subjected to input terminal conversion processing, and the obtained image data is stored in an input buffer memory.

Image data in the input buffer memory is sent to the processor board 33 via a high speed data bus.

This processor board 33 performs -dimensional Fourier transform or two-dimensional Fourier transform processing.

In this case, the frame memory 34 is used as a buffer for data that is being processed or for storing reference data for determination. The converted image data (de-ciphered) is sent to the memory of the monitor board 35. The monitor board 35 performs digital-to-analog conversion processing and sends the image to the monitor via the image output terminal 36.

Note that an interface 37 is also connected to the control bus connected to the human power board 32, processor board 33, frame memory 34, and monitor board 35. A microcomputer is connected to the interface 37, and can control switching of image processing modes, for example.

In the above description, the circuit of FIG.
3, the function of the image conversion processing device 14 can also be provided by switching the software program on the processor board.

FIG. 3 shows a specific example of the configuration of the processor board 33. The processor board 33 includes a digital processor 331 connected to a data bus, and a memory controlled by the digital processor 331, and includes a plurality of data buses 33a to 33c connected to a high-speed data bus. The digital processor 331 can control the data in the data memory and perform data processing such as Fourier transformation, rotation, and difference detection.

Rotational difference detection converts the image to 9 when performing two-dimensional Fourier transformation.
This is done when the pattern is rotated by 0" and matching with the reference pattern is inspected.

In the embodiments described above, when image data is to be concealed, component image data is subjected to one-dimensional or two-dimensional Fourier transform without being particularly conscious of its components in order to perform Fourier transform. However, it is not limited to this.

That is, the real part image and the imaginary part image, which have been subjected to -dimensional Fourier transform or two-dimensional Fourier transform processing, may be hidden side by side, or the lower 8 bits of the real part (0 to 7 bits) may be hidden.
) and the 8 bits (8 to 15 bits) above it may be hidden. For example, image data includes luminance components,
It contains R, G, and B components, but any one of these is processed as confidential data, the remaining components and confidential information are printed on the printed matter, and only the specified components are decondensed when inspected. You may also do so.

In addition, in the above embodiment, when creating confidential information, it was explained that the entire image data acquisition means is converted to be confidential information, but the invention is not limited to this. The screen may be divided into four (for example, four), and the color information of one of the divided screens or a specific screen may be subjected to confidential information processing. Furthermore, data on a plurality of split screens may be selectively concealed.

Furthermore, in the above embodiment, it has been explained that the confidential information is created by Fourier transformation, but this is not limited to this, and in a broader concept, the image data is scrambled and created as print data, and on the inspection side, the captured information is Data may also be descrambled.

Further, in the above embodiment, the confidential information is printed on the cash card on which the magnetic stripe is printed in advance, but the magnetic stripe may be printed after the confidential information is printed. Furthermore, when identifying cash cards,
You may first check the confidential information and then use the magnetic stripe code information and PIN number to determine the identity.

Furthermore, confidential information is printed on other than cash cards! A D card or credit card is also acceptable.

According to this invention described above, information that has been subjected to fast Fourier transform processing is printed on the cash card, but the printed information (pattern or design) is extremely difficult to forge using simple printing technology, and By using this in combination with the code information stored in the magnetic stripe of the card, effective counterfeit prevention can be obtained.

[Effects of the Invention] As explained above, the present invention can provide a security system in which it is difficult to forge various cards.

[Brief explanation of drawings]

FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing a specific example of the image conversion processing device in FIG. 1, and FIG. 3 is a specific example of the processor board in FIG. 2. It is a diagram. 12A, 22.27... Video camera, 14... Image conversion processing device, 15... Microcomputer, 1
6...Printing data memory, 17...Printing device, 2
3... Image conversion processing device, 24... Monitor, 25.
...Check device, 26...Message device, 28.
...Image processing device.

Claims (3)

[Claims] (1) The print data creation means creates print data to be printed on the printed matter and stores it in the storage means, the printed matter creation means includes information corresponding to the print data in the printed matter, and the inspection device includes information in the printed matter. In the system for inspecting the presence or absence of information, the print data creation means includes an image data acquisition means that acquires image data, and an image data acquisition means that performs pattern conversion processing on the image data obtained from the image data acquisition means to obtain confidential information. The inspection device includes a conversion processing means and a storage means for storing confidential information from the image conversion processing means as print data on printed matter, and the inspection device acquires confidential information corresponding to the printed data from the printed matter as image data. and an inverse pattern conversion means for performing a predetermined inverse pattern conversion process on the image data obtained by this means to obtain image data corresponding to the confidential information, and the printed matter has code information. A security system comprising a retracted magnetic stripe. (2) The print data creation means creates print data to be printed on the printed matter and stores it in the storage means, the printed matter creation means includes information corresponding to the print data in the printed matter, and the inspection device includes information in the printed matter. In the system for inspecting the presence or absence of information, the print data creation means includes an image data acquisition means for acquiring image data, a Fourier transform for the image data obtained from the image data acquisition means, and a system for performing the Fourier transformation on the image data obtained from the image data acquisition means. an image conversion processing means for obtaining confidential information by arranging the real part image and the imaginary part image, and a storage means for storing the confidential information from the image conversion processing means as print data on printed matter,
The inspection device includes a means for acquiring confidential information corresponding to the print data from the printed matter as image data, and performs a predetermined inverse pattern conversion process on the screen data obtained by this means to convert the confidential information to the confidential information. and reverse pattern conversion means for obtaining corresponding image data. (3) The print data creation means creates print data to be printed on the printed matter and stores it in the storage means, the printed matter creation means includes information corresponding to the print data in the printed matter, and the inspection device includes the information in the printed matter. In the system for inspecting the presence or absence of information, the print data creation means includes an image data acquisition means for acquiring image data, a Fourier transform for the image data obtained from the image data acquisition means, and a system for performing the Fourier transformation on the image data obtained from the image data acquisition means. The lower 8 bits of the real part
t image and an 8-bit image thereon to obtain confidential information, and a storage means for storing the confidential information from the image conversion processing means as print data on printed matter, The inspection device includes means for acquiring confidential information corresponding to the print data from the printed matter as image data, and performing a predetermined inverse pattern conversion process on the image data obtained by this means to correspond to the confidential information. and reverse pattern conversion means for obtaining image data.