JPH0417543B2 - - Google Patents

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention is a method for transacting transactions by bidirectionally transmitting and receiving text and graphic information between an information terminal and a user terminal using a transmission line such as a telephone line. When you make a transaction, please enter your PIN number to confirm that the transaction is official.
The present invention relates to a method for generating a hidden code for a personal identification number in a transaction processing method that generates a hidden code that cannot be misused by others.

``Prior Art'' Conventionally, transaction processing devices that use ID cards to perform predetermined transactions have been used, for example, in automated teller machines and automatic deposit machines at banks, where users bring their ID cards and use them directly. Since the device is operated, the PIN number is not left on printed matter after the transaction is completed.

On the other hand, Videotex (text and graphic information network system, so-called captain system)
uses telephone lines to provide subscribers with graphic and text information for shopping, movie reservations, stock sales, airline ticket reservations, etc. in response to individual requests. At the end of the transaction, it is necessary to print and leave a personal identification number on the temporary ticket to prove that the transaction has been completed.

``Problems to be solved by the invention'' However, if the PIN is printed and left on the temporary ticket, there is a problem that it may be misused if it is lost or stolen. Furthermore, it is desirable to convert it into a hidden code and store it on the information terminal side and the user terminal side.

"Means for Solving Problems" The present invention was made in order to fulfill the above-mentioned needs.It converts a personal identification number into a binary number, divides this binary number into two digits, and divides the number into two. Add an arbitrary binary number to each binary number so that it becomes 4 digits, convert it to hexadecimal and use it as the first and second confirmation numbers, and use these first and second confirmation numbers with the information terminal device. This is done as a hidden code on the host system side and the user side, and upon verification, the first and second confirmation numbers are rearranged in reverse order to restore the PIN number.

``Operation'' Converts each digit of the PIN number into a 4-bit binary number, rearranges the binary numbers vertically, and divides each digit into two. Add any binary number to the divided binary number to make 4 digits, and then convert it to hexadecimal number. Then, the first and second confirmation numbers are obtained, and these are recorded as hidden codes on the information terminal side and the user terminal side, respectively. During verification, only when the hidden codes are combined will the original PIN be restored.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

Figure 1 is an explanatory diagram of a transaction processing device that uses Videotex.
And Pattern Telephone Access Information
System). Also, Prestel in the UK, Teletel in France, Theridon in Canada,
America's Bieuron is also a type of videotex. In FIG. 1, 1 is a user terminal device, 2 is an information terminal device, and between them,
It is coupled via a telephone exchange 3 and a telephone line 4.

The user terminal device 1 includes a monitor television 5,
Consists of a telephone 6, a videotex adapter 8 for connection with the telephone 6 and videotex 7, a printer 9 such as a facsimile, character printer, image printer, etc., a home computer 10, a remote keypad 11, a voice input response device 12, etc. has been done. The telephone exchange 3 also includes a VRS 13, a home facsimile 14, in addition to the videotext 7.
etc. are combined.

In addition, the monitor TV 5 is equipped with Videotex 7.
In addition, it can receive signals from general television stations 15 and pay television broadcasting stations 16, receive radio waves from broadcasting satellites 17 via receiver 18,
It is possible to receive signals from CATV 19 and interactive television 20.

Next, FIG. 2 is a detailed explanatory diagram of a videotex consisting of a user terminal device 1 and an information terminal device 2. Placed at securities companies, theaters, etc. These information terminal devices 2, 2...
are all coupled to an information center 22 of a host system 21, and information is stored in an information memory 25 via an interface 23 and a processing device 24 of this information center 22. However, it is also possible to send the information directly from each information terminal device 2 to the user terminal device 1 through a telephone line connected by the user. Further, an image conversion center 27 is connected to the information center 22 via an interface 26, and this image conversion center 27 includes an interface 28, a control device 29, an information memory 30, an image conversion device 31, and a line compatible device 32. It consists of This image conversion center 27 includes the telephone exchange 3,
3, 3... to each user terminal device 1, 1.... These user terminal devices 1, 1, . . . have different processing methods, such as adapter type and built-in type, and a home computer (personal computer) can be used as the user terminal device.

Note that the information terminal devices 2, 2... each have a display section 3.
3, an operation section 34, a printer 35, a reading section 36, a control device 37, and the like. Further, in the user terminal devices 1, 1, . . . , 38 is a line connection device.

Next, FIG. 3 shows the remote keypad 11.
It shows. In this figure, as things related to the video text 7, an indicator light 39 and an on button 4 are shown.
0, End button 41, Super (image composition) button 42, Table of contents guide button 43, Stop/re-scroll the image button 4
4. Image pattern copy button 45, backward button 46, switch button 47, resend button 48, memory button 49, understand button 5
0, an adjustment start button 51, an execution button 52, and various shortening buttons 53, 53, . . . The various shortcut buttons 53 can be used for stock purchases A, shopping B, movie reservations C, etc., for example.

Other common television buttons include channel selection buttons 54, 54, . . . and a volume button 55.

Next, FIG. 4 shows a circuit diagram of a personal computer as an example in which the user terminal device 1 is used. In this diagram,
56 is the CPU, 57 is various interfaces, 5
8 is a buzzer, 59 is various signal processing circuits, 60 is
ROM, 61 is RAM, 62 is video memory, 9 is image printer, 63 is CRTC, 64 is video interface, 5 is monitor TV, 65 is interface, 66 is a 1-chip microcomputer for control,
67 is an ID card reader, but keyboard 7
It is not necessary when entering the PIN number from step 5.
68 is an interface, 69 is a 1-chip microcomputer for control, and 11 is a remote keypad, which is an interactive response input device. 75 is a personal computer keyboard, 70 is a copy interface, and 71 is a printer for characters and symbols, and any one of the above image printers 9 is sufficient. 72 is interface, 8
8 is a videotex adapter, and this adapter 8 is not necessarily necessary as long as it can be connected to a telephone line and can respond to the connection in an interactive manner. 73
is a non-volatile RAM, and 74 is various interfaces.

Next, the operation of the present invention will be explained using the case of movie reservation as an example.

The user inserts the ID card into the ID card reader 67 of the user terminal device 1. This ID card has information such as the ID card, information terminal company code, PIN number that can be checked with the authentic person, and validity code stored in a bar code or other magnetic form, and is read by the ID card reader 67. or ID
A personal identification number and the like are input using a key without using a card, and this signal is once sent to the host system 21 via the CPU 56, videotex adapter 8, telephone line 4, and exchange 3. This host system 21 determines whether the user is a regular member, and if the member is a regular member, the terminal information is connected to the information memories 25 and 30, so that the terminal information can be called up at any time.

The user calls up movie reservation information by operating various push buttons on the remote keypad 11. Then,
Information from the host system 21 is displayed on the monitor television 5 of the user terminal device 1. If you can't find what you want to reserve, switch to other information. After repeating this several times, if the conditions such as event date and time, seat number, admission fee, etc. match, and you find something you want to reserve, press the execution button 52 to execute the reservation. At this time, the image pattern of the monitor television 5 (a hidden code of the password may be included) can be printed as is by the image printer 9. Furthermore, when a reservation is made, the printer 9 of the user terminal device 1 issues a provisional ticket on which the date and time of the event, seat number, admission fee, number of people, etc. are printed. When a transaction such as issuing a provisional ticket or a transaction reservation is established, hidden characters or hidden codes such as symbols are printed to prevent unauthorized use by others.

In order to go to a ticket office such as a movie theater or Playgate and exchange for a genuine ticket, or to confirm that the person is the genuine person, one of the following combinations of A, B, C, and D must be verified.

A. The PIN number in the temporary ticket issued by the user terminal device (hidden code if it is a number or symbol). B. The PIN number entered by the person who brought the temporary ticket. C. The PIN number stored in the host system 21. D. PIN number recorded on the card If the card has a temporary ticket, the authentic person and the temporary ticket are verified by comparing A and B or B and C.

If the person does not have a provisionally issued ticket, B and D are compared to verify that the person is the genuine person who issued the provisionally issued ticket.

Although the above embodiment uses videotext for interaction, any two-way remote information system can be used. For example, the interactive television 20 shown in FIG. 1 may be used.

Next, an example of a method for generating the hidden code will be explained.

A case where a password is converted into a hidden code will be explained as an example.

(1) Set the password to "4792".

(2) Converting this PIN number to binary number, "4" is "0100" "7" is "0111" "9" is "1001" "2" becomes "0010".

(3) From this binary number, if you take the first and third digits for one temporary ticket, you get "10", "11", "01", and "00".

Note that the second and fourth digits are used for the information terminal device or host system, as will be described later.

(4) Add to this any number of items (regular or irregular, as long as they have standards that can be restored to the information terminal device or source system).
Add bits to the upper digits (or lower digits) and convert to "1110", "0011", "1101", and "0000".

(5) Converting this to hexadecimal number (in hexadecimal number, 10,
11, 12, 13, 14, 15 are A, B, C, D, E,
F), "E, 3, D, C".

(6) This "E3D0" is returned to the user terminal device 1 as a confirmation number for the PIN number, and during temporary ticket issuance, this character data is printed as it is, or it is converted into a barcode and printed, or it is recorded magnetically. .

(7) On the other hand, the information terminal device or host system 21 has the remaining 2nd and 4th digits of the binary number of the above PIN number "4792" as "00""01""10""01" becomes.

(8) Add to this any number (regular or irregular, as long as it has a standard that can be restored to the information terminal device or host system).
Add bits to the upper digits (or lower digits) and convert to "1100", "0001", "1110", and "0001".

(9) Converting this to hexadecimal It becomes "C, 1, E, 1".

(10) This "C1E1" is stored in the memories 25 and 27 in the information terminal device or host system 21 for confirmation of the password.

(11) Next, the first confirmation number "E3D0" converted from the PIN code printed during provisional ticket issuance and the second confirmation number "E3D0" stored in the memory of the information terminal device 2 or the host system 21 are sent. C1E1" and the tally (combination of necessary bits), restore the original PIN as follows. A decimal PIN number can be obtained by converting this restored binary number. In other words, first, the first provisional ticket is issued.
Convert the confirmation number to binary and take the 3rd and 4th digits: E → "1110" 3rd and 4th digit "10" 3 → "0011" 3rd and 4th digit "11" D → "1101" 3 and 4 digits "01" 0 → "0000" 3 and 4 digits "00" are obtained.

In the same way, convert the second confirmation number of the information terminal device 2 or host system 21 into a binary number and take the third and fourth digits: C → "1100" → 3rd and 4th digit "00" 1 → "0001" → 3 and 4 digits "01" E → "1110" → 3 and 4 digits "10" 1 → "0001" → 3 and 4 digits "01" are obtained.

Arranging the numbers on the provisional ticket into the first and third digits, and rearranging the numbers on the information terminal device 2 or host system 21 into the second and fourth digits, "0100" → 4 "0111" → 7 "1001" → 9 "0010" → 2 is obtained.

In this way, the password is obtained only after the data on the information terminal device 2 or host system 21 side and the data on the temporary ticket issuing side are combined. By comparing this restored PIN with the PIN entered by the person who brought the provisionally issued ticket at the counter using the information terminal device 2 or the host system 21, the authentic person and the provisionally issued ticket can be verified. . Alternatively, even if you do not bring the temporary ticket, the authenticity of the temporary ticket can be determined by comparing the PIN entered by the person who brought the ID card with the PIN stored in advance in the information terminal device 2 or host system 21. It is also possible to verify the identity of the person.

In the above generation method, the password is converted into a binary number and then divided into two digits each, but it may be divided into two digits and one digit and three digits. In this case, it is sufficient to add three extra bits to the one digit, and one extra bit to the three digit.

"Effects of the Invention" As described above, the present invention divides a user's unique PIN into two, generates new first and second confirmation numbers, and sends these to the information terminal device or host system and the user. These first and second
By restoring the PIN from the confirmation number, it is verified whether the person is the real person and whether the transaction is genuine. Therefore, the PIN number will not be known or stolen by anyone other than the user.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a transaction processing device in which the hidden code generation method according to the present invention is used, FIG. 2 is a block diagram of the same, and FIG. 3 is a front view of a remote keypad.
FIG. 4 is a circuit diagram of the user terminal device. 1... User terminal device, 2... Information terminal device,
8...Video text adapter, 21...Host system.

Claims (1)

[Scope of Claims] 1. After converting a personal identification number into a binary number, dividing this binary number into two in units of digits, and adding an arbitrary binary number to each divided binary number so that it becomes four digits. Convert it to hexadecimal and use it as the first and second confirmation numbers. These first and second confirmation numbers are used as hidden codes on the host system side and the user side. When checking, use the first and second confirmation numbers. 1. A method for generating a hidden code for a PIN number in a transaction processing method, characterized in that the PIN number is restored by rearranging the PIN numbers by performing a reverse operation. 2. A PIN number in the transaction processing method according to claim 1, in which the PIN number converted into a binary number is divided into two digits each, and each of these arbitrary binary numbers is added two digits at a time to make each 4-digit number. hidden code generation method. 3 Divide the PIN number converted into binary into 1 digit and 3 digits, add 3 digits of any binary number to the 1 digit,
A method for generating a hidden code for a personal identification number in a transaction processing method according to claim 1, wherein one arbitrary binary number is added to each of the three digits to make four digits.