FR2791153A1 - SECURE PORTABLE DIGITAL DATA MEDIUM, AND SECURITY METHOD USING SUCH A DATA MEDIUM - Google Patents

Abstract

The invention concerns a secure portable digital data handling medium comprising a receiver interface (10) adapted to receive input data coming from a user electronic device by detecting the movements imposed on the data handling medium by the user device; an output interface (11) adapted to transmit output data on the basis of the received input data; and a central electronic unit (7) connected to the receiver and transmitter interfaces and adapted to determine the output data on the basis of the input data and to cause said output data to be transmitted.

Description

!

  Secure portable digital data carrier, and method

  security die using such a data carrier.

  The present invention relates to secure portable digital data carriers, and to methods

  security using such data carriers.

  More particularly, the invention relates to a secure portable medium for digital data readable by a user electronic device comprising at least one input interface, said data medium comprising an electronic security device which comprises:

  - a reception interface adapted to receive

  view input information from the user electronic device, - a transmission interface adapted to transmit output information as a function of the input information received, this output information corresponding (directly or indirectly) to a code of security

  O20 intended to be communicated to the input interface of the ap-

  similar user electronics, - and an electronic central unit connected to

  reception and transmission interfaces and suitable for

  complete exit information based on information

  input information and to send said information

  output via the send interface.

  US-A-5,652,838 describes an example of a

  such a secure portable digital data carrier,

  titled in this case by an optical disc. The input interface is made up of optical sensors adapted to detect the laser beam reading from a computer

  using the optical disc, which laser beam is

  ordered so that its passing sequence on the sensors

  optics correspond to a certain entry code. Inter-

  The output side of the optical disc is constituted by a screen which displays an exit code according to the entry code received from the computer. User must exit

  the optical disc of his reader to read the exit code

  tie, after which said user types this code on the keyboard

  computer, which allows the use of the

  optical disc by computer. We protect ourselves against

  be illegal copies of the optical disc.

  These provisions have the disadvantage of obli-

  manage the user to take the data carrier out of their reader to read the exit code displayed on the screen

  said data carrier, which is tedious.

  This has been removed from the op-

  secure tick disclosed in document US-A-5,790,489, where the transmission interface is constituted in particular by

  liquid crystal displays with a coefficient of

  bending is controlled by the central unit and which are read

  by the laser beam of the optical disc reader of the

  dinator. This solution has the drawback, however: - of forcing the software allowing the reading of the optical disc to be modified, in order to be able to correctly interpret the signals emitted by the reflecting liquid crystal diodes,

  - and possibly reduce the stock area-

data age of optical disc.

  The object of the present invention is in particular to avoid all of the aforementioned drawbacks, in order to provide a secure data medium such as the code for

  can be communicated to the device used

  of the data carrier as simply as in document USA-5,652,838, reducing as little as possible

  data storage capacities of the data carrier

  born, and without the need to manipulate the sup-

  data port to determine said security code

tion.

  To this end, according to the invention, a portable support

  The secure application of digital data of the kind in question is essentially characterized in that the transmission interface comprises an acoustic transducer which transmits [5 the output information in the form of an acoustic signal. So the exit information or the code of

  are transmitted to the electronic device used

reader:

  - either indirectly, for example through

  diary of a human operator who listens and decodes the

general acoustic,

  - either directly when said interface for

  of this device is a microphone or the like.

  The emission of output information by acoustic means has the advantage of being very directive and therefore of being widely disseminated, including

  the reader of the electronic device used

  of the data carrier, which makes it possible to capture the

  your exit information without having to take out the support

data from its reader.

  In addition, when the output information is picked up by a microphone or the like, the wide distribution of the acoustic signal carrying said output information allows great freedom of choice in the placement of this microphone, including outside of the device

  electronic data carrier user.

  In preferred embodiments of the data medium according to the invention, it is optionally possible to have recourse to one and / or the other of the following arrangements: the central unit of the data medium is adapted to make emit the acoustic signal by the transducer in the form of a series of sound signals

  of variable durations separated from each other by pegs

  silence riodes of predetermined duration, the output information being coded by the variation of the duration of the various sound signals; the central unit of the data carrier is adapted to transmit the acoustic signal by the transducer in the form of several signal trains

  sound signals each comprising several electrical sound signals

  constant duration, the number of sound signals

  of each train of sound signals being com-

  taken between 1 and an integer n at least equal to 2, the sound signal trains being separated from each other by periods of silence at least equal to a predetermined duration, and the output information being coded by the number of signals elementary sound signals of each train of sound signals; - the transducer is an electronic buzzer which emits an acoustic signal having a constant emission frequency spectrum; - the transducer is a speaker associated with voice synthesis means, the central unit of the support

  of data being adapted to transmit from the top-

  speaker an audible message understandable by a human operator and containing the output information; - the data medium is intended to undergo at least one predetermined movement imposed by the user electronic device during the reading of said medium

  data, the interface for receiving said data carrier

  born with a motion sensor adapted to detect

  ter the movements of the data medium, the central unit of the data medium being adapted to determine the

  input information depending on the detection of

  data carrier events over time; the central unit is adapted to determine the input information as a function of the detection and or the absence of detection of movement of the data medium over time;

  - the data carrier is intended to undergo more

  several predetermined movements imposed by the user electronic device when reading said data medium, the central unit of the data medium being

  adapted to determine the entry into function information

  tion of the detections of said several predeter movements-

  mined from the data medium over time (these

  if necessary, could be used independently

  particularly of the arrangements described above, and in particular independently of the production of the transmission interface in the form of an acoustic transducer); - the motion sensor is an acceleration sensor; - the data carrier is intended to be used

  rotation at least at a speed predetermined by the apparatus

  reil electronic user when reading, the cap-

  motion controller being a radial acceleration sensor adapted to detect the rotation of the data carrier at said at least one predetermined speed; - the motion sensor is a micro-generator

  of current which is adapted to generate an electric current

  only when the data carrier is in motion and which

  at least partially supplies the safety device

  tion in electrical energy; - the central unit is adapted to deactivate when the motion sensor detects movement of said

  data carrier that does not meet certain criteria

  predetermined res corresponding to normal use

  male; - the central unit is adapted to deactivate

  when the motion sensor detects consistent movement

  continuous for at least a predetermined period;

  - the data carrier is readable by a

  electromagnetic (especially luminous) skin which locally heats said data medium during its reading, the reception interface comprising at least one thermoelectric element which has at least one electrical characteristic which varies according to its temperature, this

  thermoelectric element being connected (directly or indi-

  right) to the central unit of the data carrier, and

  the data unit being adapted to detect the

  of the electromagnetic beam on the thermo element

  electric according to variations in said characteristic

  electrical and to determine the input information according to the detection of these passages over time (these arrangements could if necessary be used independently of the arrangements described above, and in particular independently of the realization of the interface d 'emission in the form of an acoustic transducer);

  - the thermoelectric element is suitable for ge-

  create an electrical voltage when heated by the

  electromagnetic beam, this electrical voltage con-

  titling said electrical characteristic; - the thermoelectric element is based on PZT;

  - the data medium is an optical disc.

  Furthermore, the subject of the invention is also a method of securing using a data medium as defined above, comprising the steps consisting

  - have the data carrier read in a read-

  part belonging to a user electronic device which comprises an input interface, - to have the input information transmitted by the user electronic device to the reception interface of the data medium, - to have the output information determined by the unit central data carrier, depending on the input information, output the output information as an acoustic signal by the transducer of the data carrier,

  - communicate to the electronic device used

  the security code corresponding to the information

  output, via the input interface

  entry of said user electronic device, depending on the security code received by the user electronic device, authorizing or not a certain mode of operation of said user electronic device. In preferred embodiments of the method according to the invention, it is optionally possible to have recourse to one and / or the other of the following arrangements: the acoustic signal containing the information

  output is listened to by a human operator, which operates

  tor determines the security code according to the

  listened to and communicate this security code to the ap-

  such user electronics via its input interface; - the acoustic signal containing the output information is received directly by the input interface of the user electronic device; the acoustic signal containing the output information is transmitted to a remote control station which determines the security code as a function of said acoustic signal and whether or not transmits this security code to

  the input interface of the electronic device used

tor.

  Other characteristics and advantages of the invention

  tion will appear during the following description of

  several of its embodiments, given as

  of nonlimiting examples, with reference to the accompanying drawings.

In the drawings:

  - Figure 1 is a schematic view of a micro-

  computer that can use an optical disc according to the

  vention, including an electronic security circuit

tion,

  - Figure 2 is a block diagram of the electrical circuit

  tronic for securing the optical disc of FIG. 1, in a first embodiment of the invention, - FIGS. 3 and 4 are views similar to FIG. 2, respectively for second and third embodiments of the invention , - and Figure 5 is a schematic view of a

  thermoelectric element usable in the embodiment

sation of figure 4.

  In the different figures, the same references

  denote identical or similar elements.

  Figure 1 shows a microcomputer 1 com-

  taking a screen 1a, a keyboard 1b and a reader 2 for

  digital optics (CD-ROM, DVD, etc.) or others

digital data carriers.

  The object of the invention is in particular to secure

  the use of the optical disc 3, or any other medium

  similar digital data port usable by mid

  computer or other electronic device, no-

  especially to prevent illegal copies of this disc

  optical (or other data carrier).

  To this end, the optical disc 3 (or other similar data medium) comprises, preferably outside of its data storage area 4 and advantageously in its central part 5 devoid of data, a circuit

security electronics 6.

  This electronic security circuit, which is shown in FIG. 2, is integrated in the resin matrix of the optical disc and comprises:

  - an electronic central unit 7 such as a

  crocontroller or microprocessor associated with a memory 8

  which can: be internal to said microcontroller or microprocessor

  sor (one can use for example the microcontroller

  P8WE5032 marketed by PHILIPS SEMICONDUCTORS, a di-

  vision of ROYAL PHILIPS ELECTRONICS, Eindhoven,

  NETHERLANDS, or the AT89SC microcontroller commercially

  sold by the company ATMEL CORPORATION, 2325 Orchard Parkway, San Jose, CA 95131, USA), - a source of electrical energy 9 such as a miniaturized battery (for example, a battery sold under the brand TMF by the company BOLDER TECHNOLOGIES CORPORATION, 4403 Table Mountain Drive, Golden, Colorado (CO) 80403, USA), which powers the electronic circuit 6, - a motion sensor 10 such as a sensor

  acceleration, suitable for detecting for example an acceleration

  orthoradial (tangential) leration of the optical disc or preferably a radial acceleration corresponding to the speed of rotation of the optical disc 3 when it is read in the reader 2 of the microcomputer (this sensor 10 is

  used to transmit micro information

  computer to the optical disc 3, and advantageously to also control the setting in sleep and the alarm clock

  of the central unit 7 depending on the use of the device

  than optical 3), - and an acoustic transducer, preferably piezoelectric, such as a loudspeaker or an electronic buzzer 11 ("buzzer") controlled by the central unit 7 and emitting for example sound signals having a

constant frequency spectrum.

  The acceleration sensor 10 could for example be a micro-sensor (which can for example have a

  2 mm by 2 mm surface) obtained by micro-machining on if-

  silicon, such as the 2g and 50g sensors produced by the Labo-

  Electronics, Technology and Instrumentation

  tion (LETI) of CEA (ATOMIC ENERGY COMMISSION),

FRANCE.

  The device which has just been described makes it possible to implement a securing method which allows by

  example of checking the presence of the original optical disc 3

  nal corresponding to a certain application (program, database, etc.) during the initial installation of

  this application on the microcomputer 1.

  For this purpose, during execution by the micro-

  computer 1 of the installation program for the application in question, this program generates input information such as a first random code, which is transmitted by

  the microcomputer 1 to the optical disc 3.

  In the example considered here, this input information can be coded in the form of a sequence of starts and stops of the optical disc player 2, the

  encoding of input information obtainable no-

  especially by varying the duration of walking periods

  and / or disc stop periods.

  For example, this sequence of steps and stops can start with a predetermined fixed sequence of steps and stops which announces to the central unit 7 the transmission of a message containing the input information and which allows this central unit to synchronize with a predetermined time frame, each period of which contains an information bit. After this predetermined fixed sequence of steps and stops, the sequence of steps and stops contains the input information, the input information bit of each period of the time frame being equal to

  example 1 when the disc is moving and O when

that he is at a standstill.

  Reader 2 starts and stops are detected

  by sensor 10, which transmits the market information

on / off at central unit 7.

  This central unit recognizes the sequence of mar-

  preset stops / stops at the start of the coded sequence

  containing the first random code, and determines in-

  exit training based on information from

  trée: this output information can for example be in the form of a second pseudo-random code generated as a function of an encoding key contained in the

memory 8 of the central unit.

  Then, the central unit transmits the information

  output mations in the form of an acoustic signal by

the transducer 11.

  This acoustic signal can include several

  sound signal trains (for example 3 to 6 train

  sound signals) each comprising several sound signals

  close together (separated from each other for example-

  ple by a duration of 0.2 s) and of constant duration. The name-

  bre of elementary sound signals of each train

  sound signals is between 1 and a whole number

  determined n at least equal to 2 and for example equal to 4. The sound signal trains can be separated from each other by periods of silence at least equal to a predetermined duration (for example, these periods of silence

  can all be equal to about 2 s).

  The output information is thus coded by the number of elementary sound signals of each train.

of sound signals.

  The acoustic signal containing the information of

  output is listened to by a human operator, which operates

  tor thus determines the second code mentioned above in the form of a series of numbers each between 1 and n,

  corresponding respectively to the numbers of sound signals

  res of different elementary sound signal trains

  successively issued by disc 3.

  Then said operator communicates to the micro-

  computer 1 a security code based on said second code (in practice confused with said second code), for example by means of the keyboard lb. These operations are preferably guided by one or more

  messages displayed on the screen of the microcomputer.

  If the security code received is properly linked to the first code mentioned above by a predetermined relationship, the microcomputer 1 then authorizes the progress of the

  installation program; failing that, it prohibits the

of this program.

  This control of the smooth running of the program of-

  tallazion can also be obtained in particular: - by encryption of the data contained in the optical disc 3, the decryption of this data can only be carried out by the microcomputer with a key

  decryption which is a function of the security code above

  mentioned and from the first code mentioned above, - or by including in the installation program or in a program contained in the optical disc 3 and intended to be copied in the memory of the microcomputer, a connection to a programming address which does not

  can be determined that based on the security code

  mentioned above and the first mentioned code.

  The same principles can be used to control not only the installation, but the use of

  the computer application in question, by obliging the user

  reader to insert the optical disc 3 into the reader

  less when launching said application.

  In this case, note that it is also possible

  to control the terms of use of this application-

  computer based on data included in the memory 8 of the central unit of the optical disc 3, and to provide that the central unit 7 returns the second code mentioned above only if the conditions of use required

are united.

  By way of example, it is thus possible to provide: - a maximum number of uses or a maximum duration of use of the computer application,

  - or a date from which the ap-

  plica: computer ion no longer works except to buy an optical disc 3,

  - or a limitation of the pro-

  gram or data accessible to the user (in the latter case, the aforementioned security process

  must be repeated each time the user wants to ac-

  yield to a new program or data module).

  Note that the acoustic signal emitted by the

  transducer 11 could be coded other than as

  lesson described above, and in particular: - by making this acoustic signal emit in the form of a series of sound signals of variable durations separated from each other by periods of silence of

  predetermined duration, the exit information being co-

  due to the variation of the duration of the different sound signals; - or by modulating the frequency of the sound signal

  emitted (in this case, the frequency spectrum of the transducer-

  tor 1i must not be constant, this transducer can

  take the form of a piezoelectric speaker).

* Alternatively, it would also be possible to provide that the acoustic signal emitted by the transducer

  11 is received directly by the microcomputer 1, in particular

  via an external microphone 12 which is connected to an internal sound card of the microcomputer

  and which is approached from reader 2 by the user at the

  opportune, according to the indications given on the screen of the microcomputer. Given the low

  directivity of the emission of the sound signal by the trans-

  conductor 11, this sound signal diffuses very widely, including outside the microcomputer case: it is therefore easily picked up by the microphone 12. According to another variant, the acoustic signal emitted by the transducer 11 is transmitted to a remote control station 13:

  - via the microphone 12 susmen-

  and a modem 14 belonging to microcomputer 1

  and connected to the remote control station 13 via

  diary of the switched telephone network,

  - or through the user tele-

phoning at the checkpoint 13.

  In the latter case, the remote control station

  13 determines the security code as a function of said location.

  acoustic and transmits this security code to the middle

  mainframe 1 via modem 14 (or else

  the security code is given by telephone to the user

  sator, who then types it on the keyboard lb of the micro-

  computer). Optionally, the remote control station

  13 may have to not transmit this security code

  microcomputer 1, for example if the use of the computer application in question is subject to a

subscription that has not been paid.

  According to another variant, shown in the figure

  gure 3, the acoustic transducer can be a loudspeaker

  speaker 16 associated with a voice synthesis circuit 15 itself

  even controlled by the central unit 7: in this case, the loudspeaker 16 emits an audible message understandable by the user and containing the output information which corresponds to the security code. Optionally, the voice synthesis circuit 15 can be integrated into the central unit 7, constituted for example by a microprocessor of the TSP50COx / lx type marketed by the company TEXAS

INSTRUMENTS, Dallas, USA.

  According to another variant, the motion sensor could communicate to the central unit 7 a measurement of the speed of rotation of the optical disc, for example by means of an analog / digital converter.

  (not shown), and the optical disc player 2 se-

  rait controlled by microcomputer 1 for successive-

  rotate the disc at several different speeds

  annuities to code the input information. It is thus possible to transmit said input information in the form

  of a multivalent signal with more than two values, for example-

  ple quadrivalent signal if reader 2 can selective-

  stop disc 3 or rotate it three times

  different sizes: in this particular case, the flow of

  transmission of input information is doubled compared to

  port for coding said input information under the

  form of a simple sequence of steps / stops.

  Furthermore, to further increase the security of the optical disc 3, the central unit 7 is preferably adapted to deactivate in particular: - when the movement sensor 10 detects a movement of the disc 3 which does not correspond to certain predetermined criteria corresponding to a use

  normal, especially when the motion sensor

  tect continuous movement for at least a pre-

  determined (which may reveal an attempt at "pira-

  "of the optical disc), - and when it receives a deactivation order from the microcomputer 1, for example when the latter has received several successive erroneous codes in place of the security code corresponding to the output information of

the central unit 7.

  According to yet another variant, the ac sensor

  celeration 10 could consist of a micro-

  current generator capable of generating an electric current

  stick under the effect of the rotation of the optical disc. This current sensor, associated with an electronic circuit

  of energy storage comprising for example a condensate

  tor, could then replace battery 9, or at least supply part of the electrical energy consumed by

the electronic circuit 6.

  Note also that the transmission of information

  input training from the microcomputer 1 to the optical disc 3 can be carried out by another means than a sequence of starts and stops of the reader 2. In this case, it is nevertheless possible to keep the motion sensor in circuit 6 , to control the sleeps and awakenings of the central unit 7, as shown in the

figure 4.

  This transmission of information can be done for example by controlling the laser beam for reading the

  optical disc 2 so that it passes over one or more cap-

  light sources connected to the central processing unit 7, like this

  was already known in the prior art.

  As a variant, as shown in FIG. 4, the phenomenon of local heating of the optical disc 3 when it is scanned by the reading laser beam can be used: in this case, instead of using light sensors, uses one or more thermoelectric elements 17 which are connected to the central unit 7 each via an analog / digital converter 18 or another adaptation circuit, and which have at least one electrical characteristic which varies according to

of their temperature.

  The central processing unit 7 can thus detect the

  ges of the reading beam on the thermoelectric element 17 as a function of the variations of said electrical characteristic and determining the input information as a function of the detection of these passages over time. The thermoelectric element 17 can in particular be based on PZT (zirconium titanate - lead) and be

  suitable for generating an electrical voltage (by piezo effect

  zoelectric in the case of PZT) when heated

  by the reading beam, this electric voltage con-

  titling said electrical characteristic detected by

the central unit 7.

  For example, as shown in Figure 5,

  element 17 can be in the form of a parallel

  the epipedal of PZT 19 having a thickness e of a few

  crons in the direction of the thickness of the optical disc and a

  area of the order of 1 to a few pm2 in the parallel plane

  lele to the faces of the optical disc, this parallelepiped being

  framed by two electrodes 20 connected to the circuit 18 above-

  mentionned. Despite the brevity of the illumination of the

  ment 17 during the passage of the reading laser beam (of the order of 1 Ns), the light energy then collected by the element 17 is sufficient to generate a voltage of a few volts between the electrodes 20. In comparison with the In light of the prior art, this embodiment has the advantage of requiring less precision in positioning the

  reading laser beam with respect to the thermo element

  electric 17: indeed, even if the laser beam of

  reading does not pass exactly on the thermoelectrical element

  stick 17, but slightly to the side, the passage dudiT do

  this laser nevertheless causes heating which is de-

  tectect by the thermoelectric element 17.

  Finally, note that the securing process

  authorized by optical disc 3 or other data medium

  born according to the invention is not limited to controlling the use of programs or data contained in the

  optical disc: on the contrary, this process of securing

  tion can be used for example to identify the utility

  reader, in particular to allow payroll operations-

  remotely to allow remote access to

  protected data, without the need to

  ter the microcomputer of a security device

  specific such as a memory card reader or similar

laires.

  In this case, when the microcomputer 1 is

  with a microphone 12 and a modem 14, the security process begins with the entry of a secret code by the user on the keyboard 1b, then the aforementioned central station 13 (or similar) exchanges coded messages

  with the security circuit 7 of the optical disc, to check the consistency between the code entered by the user and a secret key contained in the memory 8 of the central unit 7, as is already known for payment cards with memory.

Claims (21)

  1. Secure portable digital data support   readable by a user electronic device (1) including   taking at least one input interface (lb, 12, 14), the-   said data carrier comprising an electronic device   security (6) which includes: - a reception interface (10, 17) adapted   to receive input information from the app   similar user electronics, - a transmission interface (11; 15, 16) adapted to transmit output information as a function of the input information received, this output information corresponding to a security code intended to be   communicated to the input interface (lb, 12, 14) of the device   user electronic reil, - and a central electronic unit (7) connected to the reception (10, 17) and transmission (11;, 16) interfaces and adapted to determine the output information as a function of the input information and for transmitting said output information by the transmission interface, characterized in that the transmission interface comprises an acoustic transducer (11, 16) which transmits the information   output in the form of an acoustic signal.   2. Data carrier according to claim 1, wherein the central unit (7) is adapted to cause the acoustic signal to be emitted by the transducer (11, 16)   in the form of a series of sound signals of durations   lines separated from each other by periods of si-   lence of predetermined duration, the output information being coded by the variation of the duration of the different sound signals.   3. Data medium according to claim 1, in which the central unit (7) is adapted to cause the acoustic signal to be emitted by the transducer (11, 16)   in the form of several sets of audible signals   each taking several elementary sound signals of constant duration, the number of elementary sound signals of each train of sound signals being between 1   and an integer n at least equal to 2, the trains of si-   sound signals being separated from each other by pegs   silence riodes at least equal to a predetermined duration   born, and the output information being coded by the number of elementary sound signals of each train sound signals.   4. Data carrier according to any one of   previous claims, wherein the transducer   is an electronic buzzer (11) which emits an acoustic signal having a constant emission frequency spectrum. 5. Data carrier according to claim 1,   in which the transducer is a loudspeaker (16) associated   linked to voice synthesis means (15), the central unit (7) of the data carrier being adapted to cause the loudspeaker to emit an audible message understandable by   a human operator and containing the exit information   tie. 6. Data carrier according to any one of   previous claims, intended to undergo at least one   predetermined movement imposed by the electronic device   user (1) when reading said data medium   born, the receiving interface of said data carrier   comprising a motion sensor (10) suitable for detecting   ter the movements of the data medium, the central unit (7) of the data medium being adapted to determine the input information as a function of the detection of the   movements of the data carrier over time.   7. Data carrier according to claim 6,   wherein the central unit (7) is adapted to determine   ner the input information according to the detection and or the absence of motion detection of the support data over time.   8. Data carrier according to claim 6, intended to undergo several predetermined movements imposed by the user electronic device (1) when reading said data carrier, the central unit (7) of the   data carrier being adapted to determine the in-   input formations according to the detections of said several predetermined movements of the data carrier over time.   9. Data carrier according to any one of   claims 6 to 8, wherein the motion sensor   is an acceleration sensor (10).   10. Data carrier according to claim 9, wherein the data carrier is intended to be put   rotating at least at a speed predetermined by the ap-   similar user electronics (1) when it is read,   motion sensor being an acceleration sensor   diale (10) adapted to detect the rotation of the support   data at said at least a predetermined speed.   11. Data carrier according to any one of   claims 6 to 8, wherein the motion sensor   (10) is a current micro-generator which is suitable for generating an electric current when the support of   data (3) is in motion and which feeds at least partially   tially the security device (6) in electrical energy. 12. Data carrier according to any one of   Claims 6 to 11, in which the central unit (7)   is suitable for deactivation when the moisture sensor   vemen. (10) detects a movement of said data medium which does not correspond to certain predetermined criteria   corresponding to normal use.   13. Data carrier according to claim 12,   in which the central unit (7) is adapted for disassembly   activate when the motion sensor (10) detects a   continuous movement for at least a predetermined period of time   born. 14. Data carrier according to any one of   previous claims, readable by an electric beam   magnetic which locally heats said support   data when it is read, the reception interface   carrying at least one thermoelectric element (17) which pre-   feels at least one electrical characteristic variable as a function of its temperature, this thermoelectric element being connected to the central unit (7) of the data carrier,   and the data unit being adapted to detect the pas-   of the electromagnetic beam on the thermo element   electric (17) according to the variations of said ca-   electrical characteristics and to determine the information   input according to the detection of these passages over time.   15. Data carrier according to claim 14, wherein the thermoelectric element (17) is adapted to generate an electrical voltage when heated   by the electromagnetic beam, this electric voltage   that ccnstituting said electrical characteristic.   16. Data carrier according to claim 14   or claim 15, wherein the thermoelectric element Trique is based on PZT.   17. Data carrier according to any one of   previous claims, consisting of an optical disc   than. 18. Securing method using a support   data (3) according to any one of claims   above, and comprising the steps of:   - have the data carrier read in a read-   (2) belonging to an electronic device used   tor (1) which comprises an input interface (1b, 12, 14), - having the input information transmitted by the user electronic device (1) to the reception interface (10, 17) of the data medium , - have the output information determined by the central unit (7) of the data carrier, as a function of the input information, - have the output information emitted in the form of an acoustic signal by the transducer (11, 16) data carrier,   - communicate to the electronic device used   (1) the security code corresponding to the information   output mations, via the interface   input (lb, 12, 14) of said electronic device used   - depending on the security code received by the user electronic device (1), authorize or not   a certain mode of operation of said electro- user picnic.   19. Securing method according to claim   18, in which the acoustic signal containing the information   output mations is listened to by a human operator, which operator determines the security code based on the signal listened to and communicate this security code to the user electronic device via its input interface (lb).   20. Securing method according to claim   18, in which the acoustic signal containing the information   output mations is received directly by the interface   input (12) of the user electronic device.   21. Securing method according to any one   of claims 18 to 20, wherein the acoustic signal   that containing the output information is transmitted to a remote control station (13) which determines the code for   securing according to said acoustic signal and trans-   whether or not to put this security code on the input interface   (14) of the user electronic device.