Method for determining the behavior of a smart card, and related server

A server comprising:

• a memory containing instructions;
• and
• a processor that is operably connected to the memory and that executes the instructions to perform operations for determining a behavior of a first smart card, the operations comprising:
• obtaining a first reference time data corresponding to a time of setting a clock of the first smart card or a second smart card, and a second reference time data corresponding to a time of reading a first time data of said clock;
• determining a time drift associated with the first smart card based on said first reference time data and on said second reference time data;
• and
• determining a behavior of the first smart card from said time drift, wherein the determining a behavior of the first smart card comprises:
• determining a variation in a speed at which said clock drifts by comparing said time drift with a previously determined time drift, and
• determining a remaining lifetime of the first smart card based on the variation in the speed at which said clock drifts;
• determining a corrected card security code from said time drift;
• and
• comparing the corrected card security code with a received card security code, wherein:
• said second reference time data is received during a phase of use of the first smart card, during a third transaction implemented by the first smart card,
• the determination of the time drift comprising a definition of the time drift at a given value, and
• the time drift being modified if the corrected card security code is different from the received card security code.

A non-transitory computer-readable recording medium on which a computer program is recorded comprising instructions that when executed by a computer, perform operations for determining a behavior of a first smart card, the operations comprising:

• obtaining a first reference time data corresponding to a time of setting a clock of said first smart card or a second smart card, and a second reference time data corresponding to a time of reading a first time data of said clock;
• determining a time drift associated with the first smart card based on said first reference time data and on said second reference time data;
• and
• determining a behavior of the first smart card from said time drift, wherein the determining a behavior of the first smart card comprises:
• determining a variation in a speed at which said clock drifts by comparing said time drift with a previously determined time drift, and
• determining a remaining lifetime of the first smart card based on the variation in the speed at which said clock drifts;
• determining a corrected card security code from said time drift;
• and
• comparing the corrected card security code with a received card security code, wherein:
• said second reference time data is received during a phase of use of the first smart card, during a third transaction implemented by the first smart card,
• the determination of the time drift comprising a definition of the time drift at a given value, and
• the time drift being modified if the corrected card security code is different from the received card security code.