EP0147837A2 - Einrichtung zur Kennworteingabe mit variabeler Tastenzuordnung - Google Patents

Einrichtung zur Kennworteingabe mit variabeler Tastenzuordnung Download PDF

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Publication number
EP0147837A2
EP0147837A2 EP84116154A EP84116154A EP0147837A2 EP 0147837 A2 EP0147837 A2 EP 0147837A2 EP 84116154 A EP84116154 A EP 84116154A EP 84116154 A EP84116154 A EP 84116154A EP 0147837 A2 EP0147837 A2 EP 0147837A2
Authority
EP
European Patent Office
Prior art keywords
digit
password number
inputting
mapping
digits
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP84116154A
Other languages
English (en)
French (fr)
Other versions
EP0147837A3 (en
Inventor
Ryuichi C/O Omron Tateisi Electr.Co. Kimizu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Publication of EP0147837A2 publication Critical patent/EP0147837A2/de
Publication of EP0147837A3 publication Critical patent/EP0147837A3/en
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/10—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means together with a coded signal, e.g. in the form of personal identification information, like personal identification number [PIN] or biometric data
    • G07F7/1025—Identification of user by a PIN code
    • G07F7/1033—Details of the PIN pad
    • G07F7/1041—PIN input keyboard gets new key allocation at each use
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00658—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys
    • G07C9/00674—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with switch-buttons
    • G07C9/00698—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with switch-buttons actuated in function of displayed informations
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/30—Individual registration on entry or exit not involving the use of a pass
    • G07C9/32—Individual registration on entry or exit not involving the use of a pass in combination with an identity check
    • G07C9/33—Individual registration on entry or exit not involving the use of a pass in combination with an identity check by means of a password
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/10—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means together with a coded signal, e.g. in the form of personal identification information, like personal identification number [PIN] or biometric data

Definitions

  • the present invention relates to a password number inputting device for use in an automatic teller machine or cash dispenser machine, and in particular to an improvement of such a password number inputting device for ensuring that the password number of a user cannot be spied out by a person who is watching the process of password number inputting.
  • a machine such as an automatic teller machine or cash dispenser machine
  • the user is typically provided with a plastic magnetic card which must be inserted into a slot of the machine for identifying him or her to the machine, and also typically knows and must input a password number (which is usually a fixed length series of digits) for further identification in order to obtain money from the machine.
  • a password number which is usually a fixed length series of digits
  • the input of such a password number has usually been performed by the use of a tenkey pad provided for the purpose.
  • a password number inputting device comprising: (a) a plurality of means for inputting digits of a password number, adapted to be manually operated l (b) a means for displaying the mapping between each of said plurality of digit inputting means and the digit which it currently represents and inputs when actuated; and (c) a means for altering said mapping between each of said digit inputting means and the digit which it represents and inputs when actuated; (d) said altering means altering said mapping between said digit inputting means and the digits which they represents and input when actuated, every time a password number is inputted.
  • a password number inputting device as detailed above, further comprising a means for restricting the visibility of said means for displaying the mapping between each of said plurality of digit inputting means and the digit which it currently represents to within a relatively narrow solid angle.
  • Fig. 1 is a schematic block diagram of the preferred embodiment of the password number inputting device of the present invention, which is denoted as a whole by the reference numeral 1, and is installed into a machine such as an automatic teller machine or cash dispenser machine, not shown in the figures.
  • This password number inputting device 1 is used by the user only for inputting his or her password to the automatic teller machine or cash dispenser machine, and other data required for the operation of this machine (such as the sum of money required by the user to be dispensed or being deposited) is inputted thereto via a conventional tenkey pad, not shown.
  • the password number inputting device 1 comprises a keyboard unit 2, an I/O control unit 3, and a display unit 4.
  • the I/O control unit 3 receives an input command from a CPU (central processing unit) of the main cash dispenser machine not shown in the figures via an input line 5, receives infomation from the keyboard unit 2 and shows information on the display unit 4 as will be explained hereinafter, and sends output to the CPU via an output line 6.
  • a CPU central processing unit
  • Fig. 2 is an exploded perspective view of a major component of the preferred embodiment of the password number-inputting device of the present invention, said major component including the keyboard unit 2 and the display unit 4 and also including a directivity providing device 7, all these parts being sandwiched together with the directivity producing device 7 in between the keyboard unit 2 and the display unit 4.
  • the keyboard unit 2 is a transparent flat keyboard which has twelve key switches Kl through K12 arranged in a three by four array. A cable, not denoted by any reference numeral, is connected to these key switches and leads to the I/O control unit 3.
  • the display unit 4 is made of an LCD panel, which has twelve displays D1 through D12 arranged in a three by four array corresponding to the array of the keyboard unit 2. A cable, again not denoted by any reference numeral, is connected to these displays and leads to the I/O control unit 3.
  • the display D10 is structured to show the symbol "CL” only
  • the display D12 is structured to show the symbol "E” only
  • each of the other ten displays Dl through D9 and Dll is structured so as to be able to show any one of the digits "0" through “9” according to control signals dispatched to it through the cable from the I/O control unit 3.
  • This directivity providing unit 7 is structured as an array of twelve rectangular tubes, arranged in a three by four array corresponding to the arrays of the keyboard unit 2 and the display unit 4.
  • This directivity providing unit 7 is structured as an array of twelve rectangular tubes, arranged in a three by four array corresponding to the arrays of the keyboard unit 2 and the display unit 4.
  • the I/O control unit 3 will not be particulary explained herein with regard to its structure, but only in functional terms, because based upon the descriptions herein various structures for implementing the disclosed functions will be conceivable of to one skilled in the relevant art without undue experimentation.
  • This I/O control unit 3 incorporates a microcomputer means of a per se conventional type which obeys a stored program and controls the keyboard unit 2 and the display unit 4 as will shortly be explained.
  • FIGs. 3A through 3E show examples of displays produced on the display unit 4, during this exemplary episode of operation;
  • F ig. 4 shows the contents of a key correspondence table built up in the memory of the I/O control unit 3 during this operational episode;
  • Figs. 5A through 5D are flow charts illustrating the operation of the program obeyed by said microcomputer in the I/O control unit 3 during said operational episode.
  • step 101 of the program the power is turned on, and then in the step 102 the display D 10 of the display unit is controlled by the I/O unit 3 to light up and to show its indication "CL", and similarly the display Dl2 of the display unit is controlled by the 1/0 unit 3 to light up and to show its indication "E”.
  • This state of the display unit 4 is shown in Fig. 3A.
  • the I/O control unit 3 determines whether a command for inputting of a password number is being received from the CPU (not shown) of the main cash dispenser machine via the input line 5, and if the answer is NO then the flow of control is transferred back to this step 103 again, to perform a tight loop until such an input command is received; while, when on the other hand the answer becomes YE S , then the flow of control proceeds next to the step 104.
  • control is temporarily passed to a subroutine, illustrated in Fig. 5D, for generating a (possibly pseudo-) random digit, and then upon return of control to this step 104 the result is stored in a storage register designated as A.
  • Fig. 5D routine is so contrived as to be prevented from returning certain digits, i.e. in fact to never return any digit which is currently stored in the key correspondence table shown in Fig. 4, but since this table is currently empty this is not a limitation, and in this step 104 any of the ten digits may be returned by the Fig. 5D routine. In this example, it is assumed that the digit "4" is returned. This digit "4", then, is stored in the register A.
  • the display Dl of the display unit 4 is controlled by the I/O unit 3 to light up and to show the indication stored in the register A, i.e. in this case "4".
  • This state of the display unit 4 is shown in Fig. 3B.
  • the digit in the register A i.e. this digit "4"
  • the first register 01 of the key correspondence table of Fig. 4 so as to indicate that the first key Kl, under which the first display Dl is located and through which said first display Dl is visible as showing the indication "4", corresponds to this digit "4".
  • the program prevents the random digit generator routine of Fig. 5 D from again providing this already provided digit "4". This may be implemented by having the random number generator check the entries in the key correspondence table of Fig. 4, or in some other manner.
  • step 108 again control is temporarily passed to the Fig. 5D subroutine to generate another random digit, and then upon return of control to this step 108 the result is stored in a storage register B.
  • the Fig. 5D routine now definitely does not return the digit "4", and so in this step 108 any of the nine remaining digits may be returned by the Fig. 5D routine. In this example, it is assumed that the digit "7" is returned. This digit "7", then, is stored in the register B.
  • the display D2 of the display unit 4 is controlled by the I/0 unit 3 to light up and to show the indication stored in the register B, i.e. in this case "7".
  • This state of the display unit 4 is shown in Fig. 3C.
  • the digit in the register B i.e. this digit "7" is stored in the second register 02 of the key correspondence table of Fig. 4, so as to indicate that the second key K2, under which the second display D 2 is located and through which said second display D2 is visible as showing the indication "7", corresponds to this digit "7".
  • the program further prevents the random digit generator routine of Fig. 5D from again providing this next already provided digit "7". As mentioned before, this may be implemented by having the random number generator check the entries in the key correspondence table of Fig. 4, or in some other manner.
  • step 112 again control is temporarily passed to the Fig. 5D subroutine to generate another random digit, and then upon return of control to this step 112 the result is stored in a storage register C.
  • the Fig. 5D routine now definitely does not return the digit "4" or the digit "7", and so in this step 112 any of the eight remaining digits may be returned by the Fig. 5D routine. In this example, it is assumed that the digit "0" is returned. This digit "0", then, is stored in the register C.
  • the display D3 of the display unit 4 is controlled by the I/O unit 3 to light up and to show the indication stored in the register C, i.e. in this case "0". This state of the display unit 4 is shown in Fig. 3D.
  • the digit in the register C i.e. this digit "0" is stored in the third register 03 of the key correspondence table of Fig. 4, so as to indicate that the third key K3, under which the third display D3 is located and through which said third display D3 is visible as showing the indication "0", corresponds to this digit "0".
  • the program further prevents the random digit generator routine of Fig. 5D from again providing this next already provided digit "0". As mentioned before, this may be implemented by having the random number generator check the entries in the key correspondence table of F ig. 4, or in some other manner.
  • the program of Fig. 5A then continues into the program of Fig. 5B.
  • each of the ten displays D1 through D9 and D11 is showing a different one of the ten digits, said digits having been randomly assigned to said displays, and the key correspondence table of Fig. 4 contains a record of the correspondence of these ten displays D1 through D9 and D11 (and their corresponding keys Kl through K9 and K11 which in this preferred embodiment lie directly above them) to these ten digits.
  • the preferred embodiment of the password number inputting device of the present invention is now ready for input of a password number.
  • the value in a register N is set to 1, as a count value for indicating how many digits of the currently being inputted password number have up till now been inputted.
  • the I/O control unit 3 determines whether a keypress has been received from the keyboard unit 2, and if the answer is NO then the flow of control is transferred bach to this step 221 again, to perform a tight loop until such a keypress is received; while, when on the other hand the answer becomes YES, then the flow of control proceeds next to the step 222.
  • step 222 a test is made as to whether it was the key K 10 which was pressed, and if the answer is NO then control is transferred to the part of the program shown in F ig. 5C, while on the other hand if the answer is YES then control is transferred to the step 223.
  • step 223 the contents of a buffer (not shown) in which the successive digits of the currently being inputted password number are being successively stored is cleared, and then next the flow of control is transferred back to the step 220, to set the number N which counts the number of digits of the password number already received to zero and to await the next keypress.
  • This part of the program handles the pressing of the "CL" key, i.e. key K10, which is for clearing an improperly entered portion of a password number, when the user of the password number inputting device of the present invention has made a mistake in operation.
  • Fig. SC when the flow of control enters this portion of the program, first a test is made in the step 301 as to whether it was the key K12 which was pressed, and if the answer is YES then control is transferred to the step 302 to be explained later, while on the other hand, if the answer is NO, then the flow of control is transferred to the one of the steps 305 through 314 which corresponds to the actual key pressed, as indicated on the flow diagram of F ig. 5C by the headings to these blocks. (The actual decision tree by which the appropriate one of these steps is reached is per se conventional and is not shown here).
  • steps 305 through 314 are all alike, except for the actual key values involved; to discuss first the step 305 by way of an example, this step 305 is reached if the actual key pressed was the key Kl, and in it the following actions are performed: the I/O control unit 3 looks up the address of the key correspondence table of Fig. 4 corresponding to this key Kl, i.e. the address 01, and takes the digit stored therein, i.e. the digit "4", and copies it to the buffer, as being the next digit of the password number entered.
  • step 315 the count N is increased by one in order to indicate that the buffer has one more digit in it, and then the flow of control is passed back to the step 221 (of Fig. 5B) to await the next keystroke.
  • the flow of control is transferred to the step 309, in which the following actions are performed: the I/O control unit 3 looks up the address of the key correspondence table of Fig. 4 corresponding to this key K5, i.e. the address 05, and takes the digit Stored therein, i.e. the digit "8", and copies it to the buffer, as being the next digit of the password number entered.
  • the flow of control passes to the step 315, in which the count N is increased by one in order to indicate that the buffer has one more digit in it, and then the flow of control is passed back to the step 221 (of F ig. 5B) to await the next keystroke.
  • the Buffer is built up to contain an ordered list of all the numerical values indicated by the displays corresponding to the keys pressed in order by the user.
  • the key K12 the enter key "E"
  • the flow of control passes to the step 302 of the Fig. 5C routine, and in this step the data stored in the buffer are all outputted by the I/O control unit 3 in the proper order (i.e. from the first to the last digit thereof in order) via the output line 6 to the CPU of the main cash dispenser machine (not shown), thus informing said CPU of the password number inputted by the user. And at this time the buffer is cleared.
  • the I/O control unit 3 turns off all the displays Dl through D9 and Dll, thus no longer showing any correspondence between the keys Kl through K9 and Kll with any digits; and then in the step 304 the values stored in the key correspondence table of Fig. 4 are likewise cleared, thus obliterating it. Finally, the flow of control is transferred back to the step 103 of Fig. 5A, to await the next command for-inputting of the next password number from the CPU of the main cash dispenser machine via the input line 5, so as to repeat the process described above for the next user.
  • a random digit is generated by a per se known random or pseudo-random digit generator.
  • this random digit is checked against the random digits that have already been produced, during this episode of setting of the displays Dl through D9 and Dll; as has been mentioned, this can be done by having the_random number generator check the entries in the key correspondence table of Fig. 4, or in some other manner.
  • this random digit is not one that has already been produced during this episode, then the flow of control leaves the subroutine; but if on the other hand this digit repeats one that already has been produced during this episode, then the flow of control is transferred back to the step 401 again, in order to force the random digit generator to try again.
  • the directivity providing unit 7 is provided, as in the shown preferred embodiment; this unit 7 restricts the possible point of view of the user for seeing the displays Dl through D12 to within quite a narrow solid angle about the perpendicular direction relative to the sandwiched combination of the keyboard unit 2, the display unit 4, and said directivity providing unit 7. This means that even if a criminally minded person egregiously peeks at the user while said user is inputting his or her password number, still it will not be possible for said person to see to what digits of the password number the various keys which are being pressed correspond. Accordingly the security of the user's password number is further enhanced.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
EP84116154A 1983-12-21 1984-12-21 Password number inputting device with variable key reassignment Ceased EP0147837A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58242954A JPS60134377A (ja) 1983-12-21 1983-12-21 暗証番号入力装置
JP242954/83 1983-12-21

Publications (2)

Publication Number Publication Date
EP0147837A2 true EP0147837A2 (de) 1985-07-10
EP0147837A3 EP0147837A3 (en) 1987-08-19

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EP84116154A Ceased EP0147837A3 (en) 1983-12-21 1984-12-21 Password number inputting device with variable key reassignment

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EP (1) EP0147837A3 (de)
JP (1) JPS60134377A (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306997A2 (de) * 1987-09-10 1989-03-15 Computer Security Corporation Verschlüsselungs- und Identifizierungssystem
US4857914A (en) * 1986-02-05 1989-08-15 Thrower Keith R Access-control apparatus
US5161190A (en) * 1987-09-10 1992-11-03 Computer Security Corp. System for encryption and identification
WO1993001072A1 (fr) * 1991-07-03 1993-01-21 Pierre Edmond Tuffet Procede de controle d'aptitude du conducteur a la conduite d'un vehicule, et dispositif de controle correspondant
EP0575087A1 (de) * 1992-06-13 1993-12-22 Miwa Lock Kabushiki Kaisha Kode-Eingabevorrichtung für ein elektrisches Schloss oder dergleichen
FR2693815A1 (fr) * 1992-07-15 1994-01-21 Gemplus Card Int Procédé de protection d'un clavier de saisie de données, et clavier pour mise en Óoeuvre.
FR2711434A1 (fr) * 1993-10-19 1995-04-28 Kime Terminal électronique à clavier d'introduction de données.
ES2070732A2 (es) * 1993-04-06 1995-06-01 Tolic Octavio Antonio Lopez Teclado de serigrafia virtual.
GB2307999A (en) * 1995-12-06 1997-06-11 Richard Henry Wells Operation device
GB2313460A (en) * 1996-05-21 1997-11-26 Bosch Gmbh Robert Graphical password entry
WO1998027518A1 (en) * 1996-12-18 1998-06-25 Siab Italia S.P.A. Fraud-proof keyboard for an automatic banking terminal
EP1513110A3 (de) * 2003-09-05 2005-12-14 Hirsch Electronics Corporation Dateneingabesysteme mit biometrischen Vorrichtungen zur gesicherten Zutrittskontrolle
WO2007129909A1 (en) * 2006-05-08 2007-11-15 Solbakken Torkel Haavard Pin code keypad with integrated shielding
GB2449445A (en) * 2007-05-22 2008-11-26 Anita Roberts A keypad with random assignment of numbers and a limited viewing angle
GB2457733A (en) * 2008-02-25 2009-08-26 Mobank Ltd Securing inputting of sensitive information
US9069932B2 (en) 2012-07-06 2015-06-30 Blackberry Limited User-rotatable three-dimensionally rendered object for unlocking a computing device
CN111540102A (zh) * 2020-04-30 2020-08-14 华南师范大学 一种动态密码电路、门禁系统和门禁控制方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1154902C (zh) * 1995-08-21 2004-06-23 柯内·色布 状态访问装置及方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981002349A1 (en) * 1980-02-15 1981-08-20 Rehm Pty Ltd Improvements in security means
US4333090A (en) * 1980-05-05 1982-06-01 Hirsch Steven B Secure keyboard input terminal

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4997522A (de) * 1973-01-19 1974-09-14
JPS58201173A (ja) * 1982-05-19 1983-11-22 Fujitsu Ltd 暗証番号処理装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981002349A1 (en) * 1980-02-15 1981-08-20 Rehm Pty Ltd Improvements in security means
US4333090A (en) * 1980-05-05 1982-06-01 Hirsch Steven B Secure keyboard input terminal

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4857914A (en) * 1986-02-05 1989-08-15 Thrower Keith R Access-control apparatus
EP0306997A2 (de) * 1987-09-10 1989-03-15 Computer Security Corporation Verschlüsselungs- und Identifizierungssystem
EP0306997A3 (en) * 1987-09-10 1989-07-26 Computer Security Corporation System for encryption and identification
US4962530A (en) * 1987-09-10 1990-10-09 Computer Security Corporation System for cryptographing and identification
US5161190A (en) * 1987-09-10 1992-11-03 Computer Security Corp. System for encryption and identification
WO1993001072A1 (fr) * 1991-07-03 1993-01-21 Pierre Edmond Tuffet Procede de controle d'aptitude du conducteur a la conduite d'un vehicule, et dispositif de controle correspondant
EP0575087A1 (de) * 1992-06-13 1993-12-22 Miwa Lock Kabushiki Kaisha Kode-Eingabevorrichtung für ein elektrisches Schloss oder dergleichen
FR2693815A1 (fr) * 1992-07-15 1994-01-21 Gemplus Card Int Procédé de protection d'un clavier de saisie de données, et clavier pour mise en Óoeuvre.
ES2070732A2 (es) * 1993-04-06 1995-06-01 Tolic Octavio Antonio Lopez Teclado de serigrafia virtual.
FR2711434A1 (fr) * 1993-10-19 1995-04-28 Kime Terminal électronique à clavier d'introduction de données.
GB2307999A (en) * 1995-12-06 1997-06-11 Richard Henry Wells Operation device
GB2313460A (en) * 1996-05-21 1997-11-26 Bosch Gmbh Robert Graphical password entry
GB2313460B (en) * 1996-05-21 1998-07-08 Bosch Gmbh Robert Graphical password entry
WO1998027518A1 (en) * 1996-12-18 1998-06-25 Siab Italia S.P.A. Fraud-proof keyboard for an automatic banking terminal
EP1513110A3 (de) * 2003-09-05 2005-12-14 Hirsch Electronics Corporation Dateneingabesysteme mit biometrischen Vorrichtungen zur gesicherten Zutrittskontrolle
US7091845B2 (en) 2003-09-05 2006-08-15 Hirsch Electronics Corporation Data entry systems with biometric devices for security access control
WO2007129909A1 (en) * 2006-05-08 2007-11-15 Solbakken Torkel Haavard Pin code keypad with integrated shielding
GB2449445A (en) * 2007-05-22 2008-11-26 Anita Roberts A keypad with random assignment of numbers and a limited viewing angle
GB2457733A (en) * 2008-02-25 2009-08-26 Mobank Ltd Securing inputting of sensitive information
US9069932B2 (en) 2012-07-06 2015-06-30 Blackberry Limited User-rotatable three-dimensionally rendered object for unlocking a computing device
CN111540102A (zh) * 2020-04-30 2020-08-14 华南师范大学 一种动态密码电路、门禁系统和门禁控制方法

Also Published As

Publication number Publication date
JPS60134377A (ja) 1985-07-17
EP0147837A3 (en) 1987-08-19

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