WO1995017739A1 - Electronic device for the operation of utilities such as burglar-alarm units, door-openers, switches and so on - Google Patents
Electronic device for the operation of utilities such as burglar-alarm units, door-openers, switches and so on Download PDFInfo
- Publication number
- WO1995017739A1 WO1995017739A1 PCT/EP1994/004179 EP9404179W WO9517739A1 WO 1995017739 A1 WO1995017739 A1 WO 1995017739A1 EP 9404179 W EP9404179 W EP 9404179W WO 9517739 A1 WO9517739 A1 WO 9517739A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- receiver
- transmitter
- variable transmission
- memory
- microprocessor
- 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
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/16—Electric signal transmission systems in which transmission is by pulses
- G08C19/28—Electric signal transmission systems in which transmission is by pulses using pulse code
-
- 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
- G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
-
- 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
- G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
- G07C2009/0023—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks with encription of the transmittted data signal
-
- 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
- G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
- G07C2009/00238—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the transmittted data signal containing a code which is changed
- G07C2009/00253—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the transmittted data signal containing a code which is changed dynamically, e.g. variable code - rolling code
-
- 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
- G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
- G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
Definitions
- the present invention relates to an electronic device for, the remote-controlled or direct-contact operation of utilities such as burglar-alarm units, door-openers, switches and so on.
- remote-control electronic devices usually known as “remote control devices” consist of a signal transmitter and of a signal receiver usually, but not necessarily, connected by wireless.
- a problem common of such devices is that of assigning a code to the signals emitted by a given transmitter that is well defined and unknown to unauthorised persons, so that that particular transmitter operates only the receiver to which it linked and the Latter responds only to the signals issued by the transmitter or transmitters associated with it.
- transmitters have been developed based on a microprocessor with a corresponding algorithm which, whenever it is activated, takes from an EEPROM-type rewritable memory an identification code of the transmitter and a dynamic transmission code that varies with a preset cyclic sequence from one transmission to another and, through a special and secret process, inserts them in a string of data that is transmitted by wireless, by optical means, by telephone, by direct contact and so on to be received and recognized by the receiver to which it is destined.
- the receiver in turn comprises a microprocessor with a corresponding algorithm, which is capable of comparing the two codes contained in the incoming string of data with one or more preset identification codes and with as many dynamic transmission codes, all contained in a single EEPROM memory, so as to verify that the identification code received coincides with one of those memorised and the transmission code is one of those immediately subsequent to the one received on the occasion of the preceding transmission.
- the receiver receives and executes only a signal transmitted by a transmitter that is linked with it, rejecting any other signal originating from another transmitter.
- the object of the present invention is to provide an electronic device for the operation of utilities such as burglar-alarm units, door-openers, switches and so on, that exhibits the same structural and functional features of the known device described above, but that is exempt from the current drawbacks of accessibility to and alteration of the identification codes.
- such object is attained with a device formed by a transmitter and by a receiver, the transmitter comprising at Least one memory for storing a fixed identi ication code and a variable transmission code and a microprocessor with a preset algorithm for the formation and emission of a string of data containing said codes, the receiver comprising at Least one memory for storing at Least one fixed identi ication code and at least one variable transmission code coincident with a previous variable transmission code received from the receiver and a microprocessor with a preset algorithm for comparing the string of data received with said identi ication code and said variable transmission code stored in said memory of the receiver, characterized in that said memory of the transmitter is constituted by a non-rewritable memory for said identification code and by a rewritable memory for said variable transmission code, both memories being included together with said microprocessor of the transmitter inside a single sealed container suitable for preventing access to the algorithm of said microprocessor and to the content of said memories.
- the receiver comprises at least one memory for said identi ication code and at least one rewritable memory for said variable transmission code, the second of which is included together with said microprocesor of the receiver inside a first sealed container, while the first is included inside a second sealed container separate from the first and connected to it.
- Fig. 1 shows a diagrammatic representation of the transmitter of a device according to the invention
- Fig. 2 shows a diagrammatic representation of the receiver of a device according to the invention.
- the device illustrated in the drawings comprises a transmitter T (Fig. 1) and a receiver R (Fig. 2) that can be connected together by wireless, by telephone, by optical means, by direct contact or by any other manner.
- the transmitter T of Fig. 1 comprises, inside a single sealed container C1, a non re-writable memory of the PROM type, denominated ID, for memorizing an identification code of the transmitter and a rewritable memory, denominated D, for memorizing a variable transmission code that at each transmission varies according to a preset cyclical sequence.
- the two memories ID and D are separate one from the other and totally inaccessible from the outside of the container C, so as not to influence one another reciprocally and not to allow the knowledge of the two codes, in particular that of identification, on the part of non-authorized personnel.
- the content of the two memories ID and D is, on the other hand, available to a microprocessor M1 with a preset algorithm, that can be activated by means of an external pushbutton P for processing the two abovementioned codes in a suitable manner and to insert them, preferably in an encrypted form, in a string of data S emitted by the transmitter T as the signal destined for the receiver R.
- the microprocessor Ml also updates the rewritable memory D.
- the receiver R of Fig. 2 in turn comprises, inside a sealed container C2, a microprocessor M2 suitable for receiving the string of data S emitted by the associated transmitter T and a plurality of rewritable memories, denominated Dl-Dn, for memorizing a variable transmission code that at each transmission varies according to a preset cyclical sequence.
- a separate container C3 that contains a plurality of memories, denominated IDl-IDn, in which the respective identification codes of the enabled transmitters are pre-memorized during the installation step.
- the microprocessor M2 receives the string of data S from a transmitter T and, after processing it, compares it with the identification codes contained in the memories IDl-IDn and with the transmission codes contained in the memories Dl-Dn, each of which is associated with a respective memory IDl-IDn. In the case where the identification code received corresponds to one of the codes contained in the memories
- the microprocessor M2 if the variable transmission code received is one of those immediately subsequent to the last one memorized, the microprocessor M2 emits an operating signal SC for the utility operated by it.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Burglar Alarm Systems (AREA)
- Lock And Its Accessories (AREA)
Abstract
The device comprises a transmitter (T) and a receiver (R). The transmitter (T) comprises one non-rewritable memory (ID) for storing a fixed indentification code, a rewritable memory (D) for storing a variable transmission code and a microprocessor (M1) with a preset algorithm for the formation and emission of a string of data containing said codes. The receiver (R) comprises at least one memory (ID1-IDn) for storing at least one fixed identification code, at least one rewritable memory (D1-Dn) for storing at least one variable transmission code coincident with a previous variable transmission code received from the receiver and a microprocessor (M2) with a preset algorithm for comparing the string of data received with said identification code and said variable transmission code stored in said memories (ID1-IDn; D1-Dn) of the receiver. Both memories (ID, D) of the transmitter (T) are included together with the corresponding microprocessor (M1) inside a single sealed container (C1) suitable for preventing access to the algorithm of said microprocessor (M1) and to the content of said memories (ID, D).
Description
"Electronic device for the operation of utilities such as burglar-alarm units, door-openers, switches and so on."
* * * * *
D E S C R I P T I O N The present invention relates to an electronic device for, the remote-controlled or direct-contact operation of utilities such as burglar-alarm units, door-openers, switches and so on.
As is well-known, remote-control electronic devices, usually known as "remote control devices", consist of a signal transmitter and of a signal receiver usually, but not necessarily, connected by wireless.
A problem common of such devices is that of assigning a code to the signals emitted by a given transmitter that is well defined and unknown to unauthorised persons, so that that particular transmitter operates only the receiver to which it linked and the Latter responds only to the signals issued by the transmitter or transmitters associated with it.
For this purpose transmitters have been developed based on a microprocessor with a corresponding algorithm which, whenever it is activated, takes from an EEPROM-type rewritable memory an identification code of the transmitter and a dynamic transmission code that varies with a preset cyclic sequence from one transmission to another and, through a special and secret process, inserts them in a string of data that is transmitted by wireless, by optical means, by telephone, by direct contact and so on to be received and recognized by the receiver to which it is destined.
The receiver in turn comprises a microprocessor with a corresponding algorithm, which is capable of comparing the two codes contained in the incoming string of data with one or more
preset identification codes and with as many dynamic transmission codes, all contained in a single EEPROM memory, so as to verify that the identification code received coincides with one of those memorised and the transmission code is one of those immediately subsequent to the one received on the occasion of the preceding transmission.
In this way it is certain that the receiver receives and executes only a signal transmitted by a transmitter that is linked with it, rejecting any other signal originating from another transmitter.
The greatest problem that the manufacturers of such remote-control devices are obliged to tackle is that of preventing unauthorised people from obtaining from a given transmitter the identity of the two codes and from them, by comparing the transmitter's output signal, the characteristics of the algorithm in use. At this point it would be easy to reproduce the transmitter in any number of specimens.
This problem is at this time unresolved in transmitters of the type mentioned above, since the EEPROM memory can be read and access to the transmitted codes is thus easy.
In addition, the use of a single rewritable memory makes it possible to change the identification code written in the memory itself, either by design or through the effect of simple external disturbances. This latter drawback can be found in the receiver as well, where the continuous exchange of information between the microprocessor and the rewritable memory to update the memorised transmission code can Lead to the alteration of the identification codes stored at installation. In view of this state of the art, the object of the present
invention is to provide an electronic device for the operation of utilities such as burglar-alarm units, door-openers, switches and so on, that exhibits the same structural and functional features of the known device described above, but that is exempt from the current drawbacks of accessibility to and alteration of the identification codes.
According to the invention such object is attained with a device formed by a transmitter and by a receiver, the transmitter comprising at Least one memory for storing a fixed identi ication code and a variable transmission code and a microprocessor with a preset algorithm for the formation and emission of a string of data containing said codes, the receiver comprising at Least one memory for storing at Least one fixed identi ication code and at least one variable transmission code coincident with a previous variable transmission code received from the receiver and a microprocessor with a preset algorithm for comparing the string of data received with said identi ication code and said variable transmission code stored in said memory of the receiver, characterized in that said memory of the transmitter is constituted by a non-rewritable memory for said identification code and by a rewritable memory for said variable transmission code, both memories being included together with said microprocessor of the transmitter inside a single sealed container suitable for preventing access to the algorithm of said microprocessor and to the content of said memories.
In that way, once the two initial codes have been written in, any possibility of access from the outside to the two memories is completely abolished with the consequent
impossibility for anyone to get to know the two codes and thus to get to know the algorithm that has been used.
Moreover, the split of the current single rewritable memory into two memories, one of which is not rewritable, for example of the PROM type, for the identification code and the other rewritable for the transmission code allows the identification code to be maintained in the first without any possibility of alteration, either intentional or deriving from disturbances of various types. Again according to the invention the receiver comprises at least one memory for said identi ication code and at least one rewritable memory for said variable transmission code, the second of which is included together with said microprocesor of the receiver inside a first sealed container, while the first is included inside a second sealed container separate from the first and connected to it.
In this way, the continuous exchange of information does not take pla.ce between the microprocessor and the rewritable memory that in the known receivers can lead to the alteration of the identification codes memorized during the installation step. These and other objects, characteristics and advantages of the present invention will be made more evident by the following detailed description of a possible embodiment thereof illustrated as a non-limiting example in the enclosed drawings, wherein:
Fig. 1 shows a diagrammatic representation of the transmitter of a device according to the invention;
Fig. 2 shows a diagrammatic representation of the receiver of a device according to the invention. The device illustrated in the drawings comprises a
transmitter T (Fig. 1) and a receiver R (Fig. 2) that can be connected together by wireless, by telephone, by optical means, by direct contact or by any other manner.
The transmitter T of Fig. 1 comprises, inside a single sealed container C1, a non re-writable memory of the PROM type, denominated ID, for memorizing an identification code of the transmitter and a rewritable memory, denominated D, for memorizing a variable transmission code that at each transmission varies according to a preset cyclical sequence. As can be seen, the two memories ID and D are separate one from the other and totally inaccessible from the outside of the container C, so as not to influence one another reciprocally and not to allow the knowledge of the two codes, in particular that of identification, on the part of non-authorized personnel.
The content of the two memories ID and D is, on the other hand, available to a microprocessor M1 with a preset algorithm, that can be activated by means of an external pushbutton P for processing the two abovementioned codes in a suitable manner and to insert them, preferably in an encrypted form, in a string of data S emitted by the transmitter T as the signal destined for the receiver R. The microprocessor Ml also updates the rewritable memory D.
The receiver R of Fig. 2 in turn comprises, inside a sealed container C2, a microprocessor M2 suitable for receiving the string of data S emitted by the associated transmitter T and a plurality of rewritable memories, denominated Dl-Dn, for memorizing a variable transmission code that at each transmission varies according to a preset cyclical sequence. There is also a separate container C3, that contains a
plurality of memories, denominated IDl-IDn, in which the respective identification codes of the enabled transmitters are pre-memorized during the installation step.
The microprocessor M2 receives the string of data S from a transmitter T and, after processing it, compares it with the identification codes contained in the memories IDl-IDn and with the transmission codes contained in the memories Dl-Dn, each of which is associated with a respective memory IDl-IDn. In the case where the identification code received corresponds to one of the codes contained in the memories
IDl-IDn and if the variable transmission code received is one of those immediately subsequent to the last one memorized, the microprocessor M2 emits an operating signal SC for the utility operated by it.
Claims
1. Electronic device for the operation of utilities such as burglar-alarm units, dooi—openers, switches and so on, comprising a transmitter (T) and a receiver (R) , the transmitter (T) comprising at Least one memory for storing a fixed identification code and a variable transmission code and a microprocessor (MD with a preset algorithm for the formation and emission of a string of data containing said codes, the receiver (R) comprising at Least one memory for storing at least one fixed identification code and at Least one variable transmission code coincident with a previous variable transmission code received from the receiver and a microprocessor (M2) with a preset algorithm for comparing the string of data received with said identification code and said variable transmission code stored in said memory of the receiver, characterized in that said memory of the transmitter (T) is constituted by a non-rewritable memory (ID) for said identification code and by a rewritable memory (D) for said variable transmission code, both memories (ID, D) being included together with said microprocessor (MD of the transmitter (T) inside a single sealed container (CD suitable for preventing access to the algorithm of said m croprocessor (MD and to the content of said memories (ID, D) .
2. Device according to claim 1, characterized in that said non-rewritable memory (ID) of the transmitter (T) is of PROM type.
3. Device according to claim 1, characterized in that said memory of the receiver (R) is constituted by at Least one memory (IDl-IDn) for said identification code and by at least one rewritable memory (Dl-Dn) for said variable transmission code, the second (Dl-Dn) of which is included together with said microprocessor (M2) of the receiver (R) inside a first sealed container (C2), while the first (ID1-IDn) is included inside a second sealed container (C3) separate from the first and connected to it.
°)
"Electronic device for the operation of utilities such as burglar-alarm units, dooi—openers, switches and so on".
* * * * *
ABSTRACT The device comprises a transmitter (T) and a receiver (R) . The transmitter (T) comprises one non-rewritable memory (ID) for storing a fixed identification code, a rewritable memory (D) for storing a variable transmission code and a microprocessor (MD with a preset algorithm for the formation and emission of a string of data containing said codes. The receiver (R) comprises at least one memory (IDl-IDn) for storing at least one fixed identification code, at least one rewritable memory (Dl-Dn) for storing at least one variable transmission code coincident with a previous variable transmission code received from the receiver and a microprocessor (M2) with a preset algorithm for comparing the string of data received with said identi ication code and said variable transmission code stored in said memories (ID1-IDn; Dl-Dn) of the receiver. Both memories (ID, D) of the transmitter (T) are included together with the corresponding microprocessor (MD inside a single sealed container (CD suitable for preventing access to the algorithm of said microprocessor (MD and to the content of said memories (ID, D). (Fig. D
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU13153/95A AU1315395A (en) | 1993-12-22 | 1994-12-16 | Electronic device for the operation of utilities such as burglar-alarm units, door-openers, switches and so on |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI93A002707 | 1993-12-22 | ||
| IT93MI002707A IT1265423B1 (en) | 1993-12-22 | 1993-12-22 | ELECTRONIC DEVICE FOR CONTROL OF USERS SUCH AS THEFT ALARM, DOOR OPENERS, SWITCHES AND SO ON. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1995017739A1 true WO1995017739A1 (en) | 1995-06-29 |
Family
ID=11367385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1994/004179 Ceased WO1995017739A1 (en) | 1993-12-22 | 1994-12-16 | Electronic device for the operation of utilities such as burglar-alarm units, door-openers, switches and so on |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU1315395A (en) |
| IT (1) | IT1265423B1 (en) |
| WO (1) | WO1995017739A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002031296A1 (en) * | 2000-10-13 | 2002-04-18 | Delivereez Pty Ltd | Electronic security apparatus and system |
| EP1411477A1 (en) * | 2002-10-16 | 2004-04-21 | Alps Electric Co., Ltd. | Handling device and method of security data |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0385070A1 (en) * | 1989-02-24 | 1990-09-05 | Daimler-Benz Aktiengesellschaft | Remote control system with a code transmitted by code words |
| JPH04143386A (en) * | 1990-10-04 | 1992-05-18 | Casio Comput Co Ltd | electronic key device |
| EP0509567A2 (en) * | 1991-03-28 | 1992-10-21 | Koninklijke Philips Electronics N.V. | Device with protection against access to secure information |
-
1993
- 1993-12-22 IT IT93MI002707A patent/IT1265423B1/en active IP Right Grant
-
1994
- 1994-12-16 AU AU13153/95A patent/AU1315395A/en not_active Abandoned
- 1994-12-16 WO PCT/EP1994/004179 patent/WO1995017739A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0385070A1 (en) * | 1989-02-24 | 1990-09-05 | Daimler-Benz Aktiengesellschaft | Remote control system with a code transmitted by code words |
| JPH04143386A (en) * | 1990-10-04 | 1992-05-18 | Casio Comput Co Ltd | electronic key device |
| EP0509567A2 (en) * | 1991-03-28 | 1992-10-21 | Koninklijke Philips Electronics N.V. | Device with protection against access to secure information |
Non-Patent Citations (2)
| Title |
|---|
| D.E.SCHREIBER: "DATA AND PROGRAM SECURE MICROPROCESSOR SYSTEM", IBM TECHNICAL DISCLOSURE BULLETIN., vol. 23, no. 7A, December 1980 (1980-12-01), NEW YORK US, pages 2960 - 2961 * |
| PATENT ABSTRACTS OF JAPAN vol. 16, no. 422 (M - 1305) 4 September 1992 (1992-09-04) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002031296A1 (en) * | 2000-10-13 | 2002-04-18 | Delivereez Pty Ltd | Electronic security apparatus and system |
| EP1411477A1 (en) * | 2002-10-16 | 2004-04-21 | Alps Electric Co., Ltd. | Handling device and method of security data |
| US7426275B2 (en) | 2002-10-16 | 2008-09-16 | Alps Electric Co., Ltd | Handling device and method of security data |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1265423B1 (en) | 1996-11-22 |
| ITMI932707A0 (en) | 1993-12-22 |
| AU1315395A (en) | 1995-07-10 |
| ITMI932707A1 (en) | 1995-06-22 |
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