CA1100593A - Programmable security system and method - Google Patents

Programmable security system and method

Info

Publication number
CA1100593A
CA1100593A CA288,094A CA288094A CA1100593A CA 1100593 A CA1100593 A CA 1100593A CA 288094 A CA288094 A CA 288094A CA 1100593 A CA1100593 A CA 1100593A
Authority
CA
Canada
Prior art keywords
code word
individual
encoding
word
secret
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.)
Expired
Application number
CA288,094A
Other languages
French (fr)
Inventor
Martin M. Atalla
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.)
Atalla Technovations Corp
Original Assignee
Atalla Technovations Corp
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
Priority to US73643676A priority Critical
Priority to US736,436 priority
Application filed by Atalla Technovations Corp filed Critical Atalla Technovations Corp
Application granted granted Critical
Publication of CA1100593A publication Critical patent/CA1100593A/en
Application status is Expired legal-status Critical

Links

Classifications

    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07FCOIN-FREED OR LIKE APPARATUS
    • G07F7/00Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08Mechanisms 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
    • G07F7/10Mechanisms 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
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07FCOIN-FREED OR LIKE APPARATUS
    • G07F7/00Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08Mechanisms 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
    • G07F7/10Mechanisms 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
    • G07F7/1025Identification of user by a PIN code
    • G07F7/1058PIN is checked locally
    • G07F7/1066PIN data being compared to data on card

Abstract

Abstract of the Disclosure A code-word security system uses a logic module which can receive an account code word (or any other data that is specific to an individual) and a secret code word from an individual for encoding in accordance with a logical combination of such code words altered in accordance with a selectable control word to produce a compiled code word of fixed length.
Such compiled code words may be stored and retrieved for com-parison with a compiled code word similarly generated during the course of an authorized transaction by such individual, or may be transmitted with coded information and other data per-taining to such authorized individual for logical manipulation.

Description

Backqround and Summary of the Invention Certain known security systems rely on the most sophisticated memory system available, i.e., the human brain, to secure digital data against unauthorized use or manipulation.
Systems of this type accept account codes and also secret codes from an individual for encoding in accordance with a coding scheme that is controlled by such code words to yield a compiled code word of fixed word length despite the length of the applied code words (see, for example, U. S. Patent No~ 3,938,091, entitled "Personal Yerification System", issued on February 10, 1976~.
One difficulty encountered in a security system of this type is that a vast number of institùtions relying in common upon such security systems require additional security against possible interactions of such encoded data between institutions, or be-tween different stations within an institution.
Accordingly, in accordance with a preferred embodiment of the present itlvention~ an additional control word is applied ll~QS93 to the encoding logic to establish a unique encryption scheme for a given institution, or at a given secured location which is a function of the control word. Thus, a large number of the order of one billion distinctive encryption schemes may be provided for operation on a comparably large number of different combinations of code words that may possibly be applied thereto.
In accordance with one aspect of this invention there is provided the method of operating a personal verification system including encoding means having an input for receiving a control code input representative of the location, and a code word input means coupled to the encoding means and operable for verifying the authority of an individual to complete transactions on the basis of the combination of an individual code word which is peculiar to the individual, a secret code word which need only be known to the individual, a control code representative of the location, and a compiled code word which is derived from the other of the code words ! the method comprising the steps, performed in selected sequence, of:
preparing a logical encoding status at the location in accordance with a selected logical combination of the control code for the location, the individual code word and a secret code word received from the individual prior to verification of his authority to complete a transaction;
encoding the combination of the control code for the location, the individual code word and the secret code word re-ceived from the individual by logically combining the control code for the location and the secret code word received from the individual to produce an encrypted control code, and by encoding the combination of the encrypted control code, the individual code word and the secret code word received from the individual in accordance with said logical encoding status to produce a compiled ~:~ code word therefrom;
preparing a record of said compiled code word for subsequent : use in verifying the authority of the individual to complete a transaction;
applying to the code word input means of the system both an individual code word for identifying the individual attempting to complete a transaction and a secret code word from such individual;

- 2 -B

preparing a logical encoding status in the encoding means of the s~stem in accordance with said logical combination of the control code for the location, the individual code word and secret code word applied to the code word input means of the system;
encoding the combination of the control code for the location, the individual code word and the secret code word applied to the code word input means by logically combining the control code for the location and the secret code word received from the individual to produce an encrypted control code, and by encoding the combination of the encrypted control code, the individual code word and the secret code word received from the individual in accordance with said logical encoding status prepared in the en-coding means of the system to produce a corresponding compiled code word therefrom;
comparing said corresponding compiled code word with the compiled code word from said record for the authorized indi.vidual having such individual code word; and controlling completion of the transaction in response to the comparison of the compiled code word from said record with said corresponding compiled code word produced from the control code for the location, the applied individual code word and secret code word received from the indi~idual attempting to complete the transaction.
In accordance with another aspect of this invention there is provided apparatus for verifying the authority of an individual ~5 to complete a transaction on the basis of logical manipulation of a control code word indicative of an encoding location, an indiv-idual's identifying code word, his secret code word and an encoded word logically derived from such code words, the apparatus com-prising:
encoding means providing a variable encoding operation which is a function of the logical combination of all code words applied thereto for producing an encoded word therefrom in accordance with said encoding operation which is also determined by said secret code word;
auxiliary encoding means coupled to receive the control code word and the individual's secret code word for producing an encrypted control code word in accordance with a logical combination thereof for application to said encoding means;

- - 2a -llO~S93 input means coupled to said encoding means for applying thereto an individual's identifying code word and the individual's secret code word for providing said encoding operation therefrom in accordance with said logical combination of the encrypted control code word, the individual's identifying code word and secret code word, said encoding means producing said encoded word for the individual in an initial transaction in accordance with said en-coding operation from the encrypted control code word, the applied individual's identifying code word and secret code word;
said encoding means also providing an encoded word in a subsequent transaction by encoding the combination of the encrypted control code word, the authorized individual's identifying code word and secret code word in accordance with a variable encoding operation which is determined by said logical combination of the encrypted control code word, the authorized individual's identify-ing code word and secret code word; and means for comparing said encoded word prepared for the authorized individual in the initial transaction with said encoded word produced during the course of a subsequent transaction to com-plete the transaction with respect to said individual's identifyingcode word in response to comparison of said encoded words.

. - 2b -l~O(~S93 Descr ption of the~ Drawings Figure 1 is a logic flow chaxt illustrating the operation of the present invention;
Figure 2 is a logic flow chart illustrating the operation of another embodiment of the present invention;
and Figure 3 is a schematic diagram of one circuit embodiment according to the present invention.
Description of the Preferred Embodiment In addition, with reference to Figures 1 and 2 hereof, there are shown logic flow charts that illustrate the inter-relationships between the various code word inputs in the operation of the present invention. In one embodiment the identifying code word (e.g., social security number, account number, driver's license number, etc., or combinations thereof) for an individual may be entered using a suitable code word entry means 31 such as a keyboard, a card reader, or the like. Similarly, a secret code word for the individual may be entered by the individual using the same or another suitable code word entry means 33 of the type discussed above.
These code words are converted to digital signals which may or may not be buffered or temporarily stored 35 for application to the encoder 37 in a selected order, independently - 2c -of the order in which the code words are received from the individual.
In accordance with the present invention, the encoding of an individual's own identifying code and his secret code in S accordance with an encoding scheme is further altered or deter-mined by the introduction of a control code word 39 which may be unique to the particular institution, or which may be unique to a particular data terminal in an institution. The encoder output is a compiled code word which may be of ixed word length (e.g., always digits~ independently of the length of the entered code words 31, 33). This compiled code word may thereafter be re-corded for subsequent retrieval and comparison with a compiled code word prepared in the same manner for an individual who attempts to complete a transaction that is secured by the present lS invention. Alternatively, the compiled code word may be con-sidered as data and transmitted along with other data (e.g. 7 inventory numbers, price information, etc.) for remote processing.
Referring now to Figure 3, there is shown a simplified schematic diagram of one e~bodiment of the present invention in which the identifying code word and the secret code word for an individual are entered in selected order using the same manual keyboard entry means 2. The individual keys 11 of the keyboard 2 are individually connectable to a grounded bus 12 by depressing or actuating the key. One output from each of the keys 11 is fed to the corresponding input of a NAND gate 13 for generating an output which triggers a one-shot 14 to produce a negative pulse Oll line 15. Each of the individual keys 11 is also connected to a corresponding input of a 12-bit latch 16, such 12-bit latch 16 being formed~ for example, by three Model 9322 integrated circuitsO

Thus, whenever a key 11 is depressed, one of the lines connected

- 3 -~100593 with the key provides a 0 (low) signal to both the 12-bit latch 16 and the NAND date 13.
The output of the NAND gate 13 fires the one-shot 14 to generate a negative-going pulse to the parallel enable input 15 of a 12-bit UP binary counter 17 to load the 12-bit latch 16 contents into the 12-bit UP binary counter 17. Initially, the 12-bit UP binary counter 17 is resting at an all 1 state, i.e., the terminal coun~ output is a "high" which when inverted through an inverter 18 provides a "low" to the count enable pulse input terminal of the 12-bit binary counter i7 to disable the binary counter 17. The binary counter 17 comprises, for examplet three Model 9316 integrated circuits.
As soon as a key 11 is depressed, a set of twelve bits is loaded from the latch 16 into the binary counter 17 and the terminal count on the binary counter 17 drops to a low which when inverted by inverter 18 produces a high count enable pulse causing the binary counter 17 to count from the loaded state up to an all 1 state which makes the terminal count high. The high is inverted by inverter 18 to a low which disables the binary counter 17 to terminate the counting function. Thus 7 the output of the inverter 18 is a high pulse of a duration corresponding to the time it takes the binary counter 17 to count clock pulses from the state loaded into the binary counter to a terminal all 1 state~ Thus~ the operating time of the counter 17 is a function of the bit state loaded into the binary counter 17, which in turn depends upon which one of the individual keys 11 was depressed.
The output of the inverter 18 is also fed to one input of a NAND gate 19 to which the output of the clock generator 21 is also connected. Thus, the NAND gate 19 serves to gate the clock pulses to the input of a 24-bit shift register 22. The number of clock pulses which are gated to the shift register 22is dependent upon the duration of the count of the binary counter 17. The 24-bit shift register 22 may comprise, for example, six Model 9300 inte~rated circuits.
Thus, the NAND gate 13, one-shot 14, latch 16, binary counter 17, clock generator 21, inverter 18 and gate 19 serve to form the key-to-clock pulse translator 5 as described above with re~ard to Figure 2. The output of the key-to-clock pulse trans-lator 5 is a train of pulses with the number of pulses in each train corresponding to the particular key actuated on the alpha-numeric keyboard 2.
A plurality of exclusive OR gates 23 are hard wired into the 24-bit shift register 22 in the conventional manner to provide a plurality of feedback paths to the input of the 24~-bit feedback shift register 22 for pseudo-randomizing the states of the register 22. The 24-bit shift register 22 is initialized to an all 0 starting state by applying a reset pulse on input line 43. Additionally, the 2~-bit cells of the shift register 22 may be selectively preset to initial conditions determined by the signals on input lines 45 to each bit cell. Thus~ the final state of the shift register 22, as manifested by the logic states on the output lines 47 from the bit cells, after all code words for an individual are entered in succession via keyboard 2 will be determined by the control code applied to inputs 45. The output lines 47 may be grouped into any suitable number, K, of n-bit alphanumeric characters for transmission as data, or for display or comparison with similar output signals in the manner described in the aforecited U. S. patent, or the like. The control code thus greatly expands the combinations of compiled code words which may be generated as a result of certain code words applied to the code entry means. In addition~ the control code and the associated encoding may be further secured against unauthorized use by modifying the control code in accordance with the secret code word received from the individual~ as illustrated in Figure 2. In this embodiment, the secret code word may be combined with a control code (for example~ Route and Transit number for a given bank) to yield an encoded control code word for application to the input 45 of shift register 22~ as shown in Figure 3. This encoding of the control code word with the secret code word may be performed in any suitable manner, for example~ by arithmetically adding or subtracting~ multiplying or dividing one nurnber by the other~ or by interdigitizing the digits of one number with the digits of the other number, or the like.
Therefore, the security system of the present invention provides greatly enhanced security for rnany institutions using similar systems through the selection of their own control codes.

Claims (2)

CLAIMS:
1. The method of operating a personal verification system including encoding means having an input for receiving a control code input representative of the location, and a code word input means coupled to the encoding means and operable for verifying the authority of an individual to complete transactions on the basis of the combination of an individual code word which is peculiar to the individual, a secret code word which need only be known to the individual, a control code representative of the location, and a compiled code word which is derived from the other of the code words, the method comprising the steps, performed in selected sequence, of:
preparing a logical encoding status at the location in accordance with a selected logical combination of the control code for the location, the individual code word and a secret code word received from the individual prior to verification of his authority to complete a transaction;
encoding the combination of the control code for the location, the individual code word and the secret code word re-ceived from the individual by logically combining the control code for the location and the secret code word received from the individual to produce an encrypted control code, and by encoding the combination of the encrypted control code, the individual code word and the secret code word received from the individual in accordance with said logical encoding status to produce a compiled code word therefrom;
preparing a record of said compiled code word for subsequent use in verifying the authority of the individual to complete a transaction;
applying to the code word input means of the system both an individual code word for identifying the individual attempting to complete a transaction and a secret code word from such individual;

preparing a logical encoding status in the encoding means of the system in accordance with said logical combination of the control code for the location, the individual code word and secret code word applied to the code word input means of the system;
encoding the combination of the control code for the location, the individual code word and the secret code word applied to the code word input means by logically combining the control code for the location and the secret code word received from the individual to produce an encrypted control code, and by encoding the combination of the encrypted control code, the individual code word and the secret code word received from the individual in accordance with said logical encoding status prepared in the en-coding means of the system to produce a corresponding compiled code word therefrom;
comparing said corresponding compiled code word with the compiled code word from said record for the authorized individual having such individual code word; and controlling completion of the transaction in response to the comparison of the compiled code word from said record with said corresponding compiled code word produced from the control code for the location, the applied individual code word and secret code word received from the individual attempting to complete the transaction.
2. Apparatus for verifying the authority of an individual to complete a transaction on the basis of logical manipulation of a control code word indicative of an encoding location, an individual's identifying code word, his secret code word and an encoded word logically derived from such code words, the apparatus comprising:
encoding means providing a variable encoding operation which is a function of the logical combination of all code words applied thereto for producing an encoded word therefrom in accord-ance with said encoding operation which is also determined by said secret code word;

auxiliary encoding means coupled to receive the control code word and the individual's secret code word for producing an encrypted control code word in accordance with a logical combination thereof for application to said encoding means;
input means coupled to said encoding means for applying thereto an individual's identifying code word and the individual's secret code word for providing said encoding operation therefrom in accordance with said logical combination of the encrypted control code word, the individual's identifying code word and secret code word, said encoding means producing said encoded word for the individual in an initial transaction in accordance with said en-coding operation from the encrypted control code word, the applied individual's identifying code word and secret code word;
said encoding means also providing an encoded word in a subsequent transaction by encoding the combination of the encrypted control code word, the authorized individual's identifying code word and secret code word in accordance with a variable encoding operation which is determined by said logical combination of the encrypted control code word, the authorized individual's identify-ing code word and secret code word; and means for comparing said encoded word prepared for the authorized individual in the initial transaction with said encoded word produced during the course of a subsequent transaction to com-plete the transaction with respect to said individual's identifying code word in response to comparison of said encoded words.
CA288,094A 1976-10-28 1977-10-04 Programmable security system and method Expired CA1100593A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US73643676A true 1976-10-28 1976-10-28
US736,436 1976-10-28

Publications (1)

Publication Number Publication Date
CA1100593A true CA1100593A (en) 1981-05-05

Family

ID=24959850

Family Applications (1)

Application Number Title Priority Date Filing Date
CA288,094A Expired CA1100593A (en) 1976-10-28 1977-10-04 Programmable security system and method

Country Status (7)

Country Link
JP (1) JPS6114550B2 (en)
CA (1) CA1100593A (en)
CH (1) CH630191A5 (en)
DE (1) DE2746859C2 (en)
FR (1) FR2369747B3 (en)
GB (1) GB1586831A (en)
SE (1) SE421472B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4328414A (en) * 1979-12-11 1982-05-04 Atalla Technovations Multilevel security apparatus and method
FR2722316B1 (en) * 1994-07-07 1996-09-06 Solaic Sa METHOD device and control and processing bank checks

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4842748B1 (en) * 1968-09-19 1973-12-14
US3702392A (en) * 1970-11-20 1972-11-07 Interface Ind Inc Methods for verifying the identity of a card holder and apparatus therefor
US3938091A (en) * 1972-03-17 1976-02-10 Atalla Technovations Company Personal verification system
US3846622A (en) * 1972-09-29 1974-11-05 Mosler Safe Co Access control apparatus
JPS5329542B2 (en) * 1974-07-08 1978-08-22

Also Published As

Publication number Publication date
FR2369747A1 (en) 1978-05-26
SE7712092L (en) 1978-04-29
GB1586831A (en) 1981-03-25
CA1100593A1 (en)
DE2746859A1 (en) 1978-05-03
SE421472B (en) 1981-12-21
CH630191A5 (en) 1982-05-28
DE2746859C2 (en) 1986-06-05
JPS6114550B2 (en) 1986-04-19
JPS5354942A (en) 1978-05-18
FR2369747B3 (en) 1980-02-29

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