WO2001013619A2 - Device, installation and method for protection against fraud in a telephone communication network in a system of prepaid communication service - Google Patents
Device, installation and method for protection against fraud in a telephone communication network in a system of prepaid communication service Download PDFInfo
- Publication number
- WO2001013619A2 WO2001013619A2 PCT/FR2000/002297 FR0002297W WO0113619A2 WO 2001013619 A2 WO2001013619 A2 WO 2001013619A2 FR 0002297 W FR0002297 W FR 0002297W WO 0113619 A2 WO0113619 A2 WO 0113619A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- telephone
- operator
- customer
- prepaid
- network
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
- H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
- H04M17/026—Constructional features
Definitions
- the present invention relates to a fraud protection device.
- It also relates to an installation which may include such a protection device and a method of protection against fraud which can be implemented by the device according to the invention.
- the invention applies to the protection against fraud of telephone communication networks within the framework of a prepaid communication service.
- an operator provides one or more customers with the possibility of obtaining prepaid telephone calls.
- the customer having previously prepaid a certain quota of communications, can benefit from the operator's telephone network to call his correspondents.
- the document FR-A-2. 646. 305 presents a Publiphone card reader which has a microprocessor comprising a coding generator operating using a predetermined area of the program memory associated with this microprocessor.
- a communication interface is able to communicate to the connection unit of the Publiphone a coded information certifying that the payment for the telephone communication has been made.
- This prepayment system is commonly found in telephone boxes for public use.
- the telephone terminal provides physical access. This formula is valid if the physical access is perfectly secure.
- the card is only the materialization of the contract between the operator and his client.
- Access to the service is as follows: the user must call a server center, communicate an identification number and a secret code; then, the host center routes the communication as long as the prepayment time is not exceeded.
- the object of the invention is to remedy the drawbacks of current systems.
- Another object of the invention is to provide perfect security for prepaid telephone communication services.
- Another advantage of the invention is to avoid having to use authorization systems (by key, by access code or by other means) and to propose a device which can be implemented for private facilities while limiting the cost and complexity of such facilities.
- the present invention relates to a device for protecting against fraud of a telephone communication network within the framework of a prepaid communication service between an operator and a customer, characterized in that it comprises means for jamming the telephone signal during its transmission between the customer's private line and the operator's telephone network, rendering ineffective any access to the communication network outside of the interference means.
- the protection device according to the invention may be presented in the embodiments set out below: the jamming means comprise a scrambler placed at the exit of the customer's private line and a descrambler placed at the entrance to the telephone network of 1 operator. it includes a router integrating the scrambler and establishing the link between the customer's private line and the operator's telephone network. - The router includes means for counting the prepaid communication time.
- the router includes means for cutting the link between the customer and the operator when the prepayment balance is reached.
- the invention also relates to a telephone installation allowing the transmission of communications within the framework of a prepaid communications service between an operator and a customer, characterized in that it comprises a device for protection against fraud of the communication network.
- the invention further relates to a method of protection against fraud of a telephone communication network within the framework of a prepaid communication service between an operator and a customer, capable of being implemented by the device according to the invention. characterized in that it consists in scrambling the transmission of the telephone signal between the customer's private line and the operator's telephone network.
- the telephone signal is scrambled at the output of the customer's private line
- the said telephone signal is scrambled at the input of the operator's telephone network.
- the prepaid communication time is counted simultaneously or after the jamming to avoid diversion of the communication socket before the time is counted.
- Figure 1 is a schematic view of the operation of an installation according to the prior art with the use of smart cards.
- Figure 2 is a schematic view of the state of the art using an access code card and a server center for authorization.
- Figure 3 is an overview of the invention in a particular embodiment.
- Such smart cards 5 are inserted at the public telephone 4 by means of a smart card reader.
- Reading the data included in the smart card 5 allows the customer to enter into communication.
- FIG. 2 illustrates a second possibility offered according to the state of the art.
- a server center is used to count down the prepayment time and allow physical access according to conditions. It immediately appears that the use of a server center is necessary according to this possibility, which requires significant development, particularly in terms of IT.
- the fraud protection device avoids any connection on the part of a malicious client downstream of the unit counting system or of the authorization system.
- the device comprises means for scrambling the telephone signal. These scrambling means are positioned at the level of the transmission between the private line 10 and the operator's telephone network 1.
- any communication which does not pass through the elements necessary for jamming cannot be understood at the level of the telephone network of the operator 1.
- the jamming means comprise two elements, namely a scrambler and a descrambler respectively marked 8 and 9 in FIG. 3.
- the scrambler 8 is positioned at the output of the private line 10 intermediate between this private line 10 and the transmission line 11.
- the descrambler 9 is in turn positioned at the input of the operator's telephone network 1 at the output of the transmission line 11.
- the transmission line 11 shown may be of a common type and use a terrestrial wired way or even a hertzian way or any other possible mode of transmission.
- a scrambler 8 and a descrambler 9 will be chosen which are designed so that the scrambling produced by the scrambler 8 can be decrypted by the descrambler 9.
- a person diverting the telephone line after the scrambler 8 would transmit information in "clear" to the operator's telephone network 1.
- the descrambler 9 would perform a decryption operation d 'a signal already unscrambled which amounts to scrambling this signal.
- the device comprises a router 13 integrating the scrambler 8 and establishing the link between the customer's private line 10 and the operator's telephone network 1.
- Such a router 13 is shown diagrammatically in FIG. 3. It ensures the routing of telephone communication from the private part of line 10 to the public part or to the transmission line 11.
- the router 13 could be the location of other services, in particular for viewing towards the client or for the integration of means for counting prepaid communications time.
- the router may include means for cutting the link between the customer and the operator when the prepayment balance is reached.
- the protection device presented here can be implemented in a telephone installation for the transmission of communications within the framework of a prepaid communications service.
- a protection device according to the invention may be used at the output of the private line 10.
- the invention also relates to a method of protection against fraud, said method being able to be implemented by the device presented above.
- the transmission of the telephone signal between the customer's private line 10 and the operator's telephone network 1 is scrambled.
- This interference system during transmission can be achieved in two stages.
- the telephone signal is scrambled at the output of the private line 10.
- the telephone signal is scrambled at the input of the telephone network of operator 1.
- the prepaid communication time is counted simultaneously or after the interference. This avoids any diversion from the communication socket before the time is counted.
- the client When he wishes to make a call, the client picks up his terminal 12 in order to take the private line 10.
- the router 13 provides the junction between the private line 10 and the transmission line 11.
- a descrambling performed symmetrically with the interference allows the recovery within the telephone network of the operator 1 of a clear and intelligible telephone signal, transmitted to the called line 2.
- the invention allows perfect securing of prepaid communications service avoiding any fraud on the communication time without having to resort to complex systems implementing smart cards or calling upon server centers.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU70114/00A AU7011400A (en) | 1999-08-12 | 2000-08-08 | Device, installation and method for protection against fraud in a telephone communication network in a system of prepaid communication service |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9910463A FR2797547B1 (en) | 1999-08-12 | 1999-08-12 | DEVICE, INSTALLATION AND METHOD FOR PROTECTING AGAINST FRAUD OF A TELEPHONE COMMUNICATION NETWORK IN THE CONTEXT OF A PREPAID COMMUNICATIONS SERVICE |
FR99/10463 | 1999-08-12 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2001013619A2 true WO2001013619A2 (en) | 2001-02-22 |
WO2001013619A3 WO2001013619A3 (en) | 2001-08-30 |
WO2001013619B1 WO2001013619B1 (en) | 2001-09-27 |
Family
ID=9549121
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/002297 WO2001013619A2 (en) | 1999-08-12 | 2000-08-08 | Device, installation and method for protection against fraud in a telephone communication network in a system of prepaid communication service |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU7011400A (en) |
FR (1) | FR2797547B1 (en) |
WO (1) | WO2001013619A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI492605B (en) * | 2007-08-31 | 2015-07-11 | Hon Hai Prec Ind Co Ltd | Device for preventing embezzlement of telephone line |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4368357A (en) * | 1980-11-14 | 1983-01-11 | International Telephone And Telegraph Corporation | Bypass apparatus for use in secure communication systems |
FR2633125A1 (en) * | 1988-06-17 | 1989-12-22 | Sgs Thomson Microelectronics | Acoustic apparatus with voice filtering card |
EP0553553A2 (en) * | 1991-12-09 | 1993-08-04 | AT&T Corp. | Security node in switched telecommunication network |
US5517555A (en) * | 1991-12-12 | 1996-05-14 | Cellular Technical Services Company, Inc. | Real time information system for cellular telephones |
WO1999063695A1 (en) * | 1998-06-02 | 1999-12-09 | Microlink Ltd. | System and method for secured network access |
-
1999
- 1999-08-12 FR FR9910463A patent/FR2797547B1/en not_active Expired - Fee Related
-
2000
- 2000-08-08 WO PCT/FR2000/002297 patent/WO2001013619A2/en active Application Filing
- 2000-08-08 AU AU70114/00A patent/AU7011400A/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4368357A (en) * | 1980-11-14 | 1983-01-11 | International Telephone And Telegraph Corporation | Bypass apparatus for use in secure communication systems |
FR2633125A1 (en) * | 1988-06-17 | 1989-12-22 | Sgs Thomson Microelectronics | Acoustic apparatus with voice filtering card |
EP0553553A2 (en) * | 1991-12-09 | 1993-08-04 | AT&T Corp. | Security node in switched telecommunication network |
US5517555A (en) * | 1991-12-12 | 1996-05-14 | Cellular Technical Services Company, Inc. | Real time information system for cellular telephones |
WO1999063695A1 (en) * | 1998-06-02 | 1999-12-09 | Microlink Ltd. | System and method for secured network access |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI492605B (en) * | 2007-08-31 | 2015-07-11 | Hon Hai Prec Ind Co Ltd | Device for preventing embezzlement of telephone line |
Also Published As
Publication number | Publication date |
---|---|
AU7011400A (en) | 2001-03-13 |
FR2797547B1 (en) | 2002-04-12 |
FR2797547A1 (en) | 2001-02-16 |
WO2001013619B1 (en) | 2001-09-27 |
WO2001013619A3 (en) | 2001-08-30 |
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