Information entry system

The present invention is an information entry system comprising a touch panel monitor screen, wherein the touch panel monitor screen displays keys for information entry, which are arranged circularly in order and the keys are rotationally shifted by a random number of key units around the center of the circular arrangement without changing the order when a user touches a predetermined option key before or after the information entry. This system also has a central processing unit and a program storage unit including an Information entry Screen Generator, a Random Number Generator, a Key Moving Unit, and a PIN Information output unit. This information entry device prevents a PIN or any other information entry from being stolen by someone who glances at the finger movement, since the entire series of the entry keys are rotated before or after the PIN entry.

BACKGROUND OF THE INVENTION

1. Technical Field of the Invention

This invention relates to an information entry system, wherein provision is made for protecting the information entry such as a PIN from being stolen.

2. Description of Prior Art/Current Technology

Various kinds of financial transaction services are provided by using IT (Information Technology) these days, such as credit cards, debit cards, digital wallets by use of smart cards and so on. Information of the card is kept in the magnetic stripe or IC chip of the card. Also, we can now use a public phone by entering a call card number instead of inserting a coin.

To use these services, a PIN or password entry is required for user identification. Nowadays using a credit card requires signature. But when a smart card is used for a credit card instead of a magnetic stripe, it requires a PIN entry. The arrangement of keys of a PIN pad on an ATM and the like is specified in ISO 9564-1 Annex-F. This specifies the key arrangement of a PIN pad to be configured as 3 numbers horizontal and 4 lines vertical. The numeric number starts from the left of the top line. However, this fixed arrangement makes it easy for another person to steal the PIN we enter by glancing at the movement of our finger based on the fixed arrangement of the keys.

In order to solve this problem, one may use a device that changes the key arrangement randomly on a touch panel screen monitor each time we enter our password. But this type of device is difficult to use, as the order of keys is random. This random arrangement of keys leads to mistouching the keys, and it takes a lot of time to push a number because a user has to look for the keys. Further, a serious problem is that a visually handicapped person cannot use this device. Furthermore, monitor screens of this type are expensive.

BRIEF SUMMARY OF THE INVENTION

1. The Objective of the Invention

The objective of this invention is to protect the information entry such as a PIN from theft by observation of the movement of our finger based on the fixed arrangement of the keys. Another objective is to provide ease of pushing keys for users, especially visually handicapped people, without changing the key arrangement.

2. The Method to Solve the Problem

The invention is made to achieve the above objectives. The invention is an information entry system comprising a touch panel monitor screen, wherein the touch panel monitor screen displays keys for information entry, which are arranged circularly in order and rotates around the center of the circular arrangement without changing the order when a user touches a predetermined option key.

The user can rotate the entry keys on the monitor screen before or after entering his PIN. By changing the locations of the keys by the rotation, it is possible to protect the PIN from being stolen by someone who tries to glance at the finger movement. Since the keys are circularly arranged in order, not random, it is easy for users including visually handicapped people to touch the keys even after rotating this device. Accordingly, this invention provides a user with an information entry device that prevents the PIN theft and key-mistouching.

The above discussed and other features and advantages of the present invention will be appreciated and understood by those skilled in the art from the following detailed description and drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Although the spirit and scope of the present invention is best described with the main non-mechanical embodiment referring toFIG. 7-10, in order to explain the invention in depth, a mechanical example is described with the mechanical embodiment, referringFIG. 1-6.

FIG. 1is the perspective view of a public phone for which this device is adapted. The information entry device of this invention12is attached to the body of the public phone10.

FIG. 2is the expanded view from the front of the information entry device12. InFIG. 3, the cross-sectional view along the line A-O and the cross-sectional view along the line A′-O are shown side-by-side. A center button of “Enter/Clear”18is installed on the body of the public phone10at the center of the information entry device12. A groove20is concentrically provided around the center button18as shown inFIGS. 2 and 3. Each key30has a button comprising connection elements34,36, and38, which send the electronic signal when the button is pushed.

The information entry device12has the entry keys30and a circular support base32on which the entry keys are mounted. The support base32is provided concentrically in the groove20, and is able to rotate around the center button18. Specifically, the support base is attached rotatably to the body of the public phone10by means of a small groove formed by protrusions44and44a. As shown inFIGS. 3 and 4, pairs of the protrusions44and44aare provided between individual entry keys30. A ratchet45for engaging one of the protrusions44is provided on the body of the public phone10in order to stop the rotation at the right point where the buttons of the keys work.

Twelve entry keys30are circularly arranged on the support base32. The numbers and symbols such as 0-9, # and * are displayed on respective keys30by raised markings30a, in order to enable visually handicapped people to recognize the respective information of the keys by touch.

Knobs32dare provided at the edge of the support base32so as to enable users to easily rotate the support base.

As shown inFIG. 3, an information tag42is attached on the backside of the support base32below each entry key30. The information tags42have a binary coding system using reflectors and non-reflectors as shown inFIGS. 4 and 5. For example, the second line ofFIG. 5shows the case of “1” wherein the rightmost is a reflector and the others are non-reflectors.

As shown inFIGS. 3 and 6, a sensor46is attached at a predetermined fiduciil point on the groove20. The sensor46has four pairs of an optical sensor50and a light-emitting diode (LED)48. This sensor46is connected to a control unit52.

How this information entry device works when a user enters his PIN is explained as follows. First, the user arbitrarily rotates the support base32using the knobs32d. The rotation will stop at some right position by means of the ratchet45for engaging one of the protrusions44, where the button34,36, and38of each key works. Then the user pushes the “Enter/Clear” key18. The button comprising connection elements22,24, and26sends an electronic signal to the control unit52. Then the control unit52receives the information of the key at the fiducial point from the sensor46. When the user pushes a necessary entry key, the control unit recognizes the information of the entry key that the user pushed by obtaining the relative location of the key pushed with respect to the fiducial point, as shown inFIG. 5.

When the information of the key at the fiducial point is “1”, and the key pushed is the second right of the fiducial point, the control unit52recognizes that the information of the key pushed is “3”. (This is the case wherein the key at the fiducial point is “a” which is actually “1” as sensed by the sensor46, and the key “c” is pushed, as can be seen inFIG. 6.) The user finishes entering his 4 digit PIN by pushing three more keys, and the above key-recognition process repeats three more times.

The main embodiment of the information entry system of this invention is explained below with reference toFIGS. 7-10.

FIG. 7Ais an overview of the touch panel screen of an ATM or PDA This system has a touch panel60and a Central Processing Unit (CPU)62. The CPU62may be connected to a program storage unit and a memory unit. As shown inFIG. 7B, the program storage unit stores an Information Entry Screen Generator75, a Random Number Generator76, a Key Moving Unit77, and a PIN Information Output Unit78. Each of the aforementioned Information Entry Screen Generator, Random Number Generator, Key Moving Unit, and PIN Information Output Unit functions as structure of this invention as each of them is executed by the CPU62after being deployed on a RAM.

FIG. 8Ashows the PIN entry screen of an ATM or PDA for which the information entry system of the present invention is adopted. The CPU62controls the touch screen monitor, which displays entry keys66, an “Enter” button68, a “Correct” button70, a “Cancel” button72, and a “Scramble” button74(Information Entry Screen Generator). The twelve keys66have respective information of 0-9, # and *.

These keys are circularly arranged in order. When the user touches the “Scramble” button74(Random Number Generator), these entry keys66rotate in order and stop at some point (Key Moving Unit). After the rotation of the keys, the CPU62obtains the rotation information by storing the number of key units shifted by the rotation (PIN Information Output Unit). Although the twelve keys66depicted inFIG. 8are arranged in a circular shape like that of a rotary phone, the shape of the twelve keys66may be rectangular or any other suitable shapes.

FIG. 8Bshows a rectangular version of the PIN entry screen of a PDA for which the information entry system of the present invention is adapted. The CPU62controls the touch screen monitor, which displays entry keys66, an “Enter” button68, a “Correct” button70, a “Cancel” button72, and a “Scramble” button74(Information Entry Screen Generator). The ten keys66have respective information of 0-9. These keys are circularly arranged in order. When the user touches the “Scramble” button74(Random Number Generator), these entry keys66rotate in order and stop at some point (Key Moving Unit). After the rotation of the keys, the CPU62obtains the rotation information by storing the number of key units shifted by the rotation (PIN Information Output Unit).

In order to provide additional security, a privacy filter, such as the one similar to 3M™ Privacy Computer Filter may be mounted on an ATM, POS, or PDA screen. With such a filter, only the person standing directly in front of the screen can see the screen, thus preventing persons peeking into from side from identifying the keys displayed. The use of such a filter alone won't prevent PIN number theft, since it is possible to guess key entries from finger movements if the location of keys is fixed. However, with the combination of the random shifting of key location and the use of a privacy filter make a PIN number theft by guessing or glancing key entries from finger movements virtually impossible.

How this information entry system works in the main embodiment is explained as follows with reference to the flowchart shown inFIG. 9. First a user inserts his card into the ATM to display the PIN entry screen (S101). Then the screen monitor displays the entry keys66circularly in order. When the user touches the “Scramble” button74on the screen monitor (S102), the CPU62generates a random number (S103) and makes the keys on the screen rotate by this random number of key units (S104). And the CPU stores the number of key units shifted by the rotation (S105), and displays the entry keys again (S106). In case the user does not touch the “Scramble” button, the user directly goes to the PIN entry step (S107). The user enters his PIN by touching the entry keys66displayed on the touch screen monitor60. Then the CPU62recognizes which keys were selected by matching the locations the user touched and the displayed information of the keys (S107). When the user pushes the “Enter” button68after completing the PIN entry (S108), the CPU62finishes the PIN entry processing.

The user has an option of entering his PIN without pushing the “Scramble” button74. (from S102to S108). Alternatively, the user may push the “Scramble” button74after entering his PIN.

As mentioned above, the user can rotate the entry keys before or after entering his PIN. By changing the location of the keys by the rotation, it is possible to protect the PIN from theft by observation of the finger movement. Since the keys are still circularly arranged in order, not random, it is easy for users including visually handicapped people to touch the keys even after rotating this device. Accordingly, this invention provides a user with an information entry device that prevents the PIN theft and key-mistouching.

The mechanical embodiment of this invention can be used for ATM, POS, or PDA terminals. The main embodiment of this invention can be used for a PIN pad of multimedia terminals for various services, which require a PIN or password entry. It is to be understood that the above-described embodiments are illustrative of only a few of the many possible specific embodiments that can represent applications of the principles of the invention. Numerous and varied other arrangements can be readily devised by those skilled in the art without departing from the spirit and scope of the invention.