公开(公告)号：US20200301467A1

公开(公告)日：2020-09-24

申请号：US16083504

申请日：2017-02-28

Applicant: GEMALTO SA

Inventor： Pascal LEROY ,  Hervé POIRIER ,  Stéphane TOUVET

IPC: G06F1/12 ,  G06F1/14

Abstract: This invention relates to a method to compensate by a server a clock deviation of a card i by maintaining a time base Tbase (i) synchronized with card i, the method comprising the steps of: receiving at a time TS a dynamic card verification dCVV code value generated by card i; providing a set of at least two dCVV code corresponding to two successive dCVV time periods; if the dCVV code received from card i corresponds to one of the dCVV codes of the provided set but is different from the reference dCVV code, determine the minimum possible timing drift Min_td between the time base maintained by the server for the card and the time base Tbase(i) of the card; updating time base Tbase(i) by addition of a time drift correction equal to the minimum possible time drift Min_td.