Method for processing data by means of an electronic data-acquisition device, corresponding device and program

1. A method for processing data by an electronic data-acquisition device, requesting to obtain data from an electronic data-providing device, the electronic data-acquisition device and the electronic data-providing device communicating with each other by using a short-range wireless communications technology defining a transmission/reception reference frequency, wherein the method comprises the following acts:

the electronic data-acquisition device determining, by itself, an interrogation frequency of transmission/reception of an interrogation signal that is different from said transmission/reception reference frequency, as a function of a frequency-determining parameter, wherein the frequency-determining parameter is a multiplication factor having a value in a range of 0.7 to 0.9 or in a range of 1.1 to 1.8, delivering the interrogation frequency; and

after determining the interrogation frequency, the electronic data-acquisition device transmitting the interrogation signal to said data-providing device at the interrogation frequency, said interrogation signal that is transmitted at said interrogation frequency comprising a request for obtaining data from said data-providing device.

2. The method for processing data according to claim 1 , wherein the act of determining the interrogation frequency comprises modifying the frequency as a function of the frequency-determining parameter.

3. The method for processing data according to claim 1 , wherein the act of determining the interrogation frequency is implemented by a frequency-determining component of the electronic data-acquisition device, said frequency-determining component being under exclusive control of a trusted execution environment (TEE) of said electronic device.

4. The method for processing data according to claim 1 , comprising:

receiving, by a frequency-determining component of the electronic data-acquisition device, a request for obtaining data;

obtaining, by the frequency-determining component, the frequency-determining parameter;

determining the transmission/reception frequency of said signal, as a function of the frequency-determining parameter, delivering the interrogation frequency;

transmitting the interrogation signal to the electronic data-providing device at said interrogation frequency.

5. The method for processing data according to claim 4 , furthermore comprising subsequently to transmitting the interrogation signal:

receiving, from the electronic data-providing device, a response signal sampled at said interrogation frequency;

obtaining a sequence of bits from said response signal, as a function of said interrogation frequency;

converting said sequence of bits into a set of data;

transmitting said set of data.

6. The method for processing data according to claim 4 , wherein the act of receiving, by the frequency-determining component of the electronic data-acquisition device, the request for obtaining data, is at least partly implemented by a private applications interface and comprises issuing an application authorization.

7. The method for processing data according to claim 6 , wherein the act of issuing an application authorization comprises:

obtaining at least one of:

a piece of data representing an applications identifier of the calling application, called an applications identifier; or

a piece of data representing a calling applications layer, called an applications layer identifier;

determining an authorization for executing the determining component as a function of at least one of said applications identifier or said applications layer identifier.

8. The method for processing data according to claim 1 , wherein the value of said multiplication factor ranges from 1.1 to 1.8.

9. The method for processing data according to claim 1 , wherein the value of the multiplication factor is determined randomly, in a range of values from 1.1 to 1.8.

10. The method for processing data according to claim 1 , wherein:

the act of determining frequency is implemented by a frequency-determining component of the electronic data-acquisition device, said frequency-determining component being under exclusive control of a trusted execution environment (TEE) of said electronic device; and

the value of the multiplication factor is determined by the component for determining upon reception of a request for obtaining data by contactless transfer.

11. An electronic data-acquisition device comprising:

a processor; and

a non-transitory computer-readable medium comprising instructions stored thereon which when executed by the processor configure the electronic data acquisition device to:

obtain data from an electronic data-providing device, the electronic data-acquisition device and electronic data-providing device communicating with each other by using a short-range wireless communications technology defining a transmission/reception reference frequency;

transmit an interrogation signal to said data-providing device at an interrogation frequency; and

determine, by the electronic data-acquisition device, itself, an interrogation frequency of transmission/reception of said interrogation signal, different from said transmission/reception reference frequency, as a function of a frequency-determining parameter, the frequency-determining parameter being a multiplication factor having a value in a range of 0.7 and 0.9 or in a range of 1.1 and 1.8, delivering the interrogation frequency, said interrogation signal that is transmitted at said interrogation frequency comprising a request for obtaining data from said data-providing device.

12. A non-transitory computer-readable medium comprising a computer program product stored thereon, which comprises program code instructions for executing a method, when the instructions are executed on a computer of an electronic data-acquisition device, wherein the instructions configure the electronic data-acquisition device to:

request to obtain data from an electronic data-providing device, the electronic data-acquisition device and the electronic data-providing device communicating with each other by using a short-range wireless communications technology defining a transmission/reception reference frequency, comprising;

determining, by the electronic data-acquisition device, itself, an interrogation frequency of transmission/reception of an interrogation signal that is different from said transmission/reception reference frequency, as a function of a frequency-determining parameter, the frequency-determining parameter being a multiplication factor having a value in a range of 0.7 and 0.9 or in a range of 1.1 and 1.8, delivering the interrogation frequency; and

after determining the interrogation frequency, transmitting the interrogation signal to said data-providing device at the interrogation frequency, said interrogation signal that is transmitted at said interrogation frequency comprising a request for obtaining data from said data-providing device.