Method for generating a plurality of unique numbers and protected card including a number such

摘要

Method for assigning a unique protected number to a physical medium, this unique protected number is generated by a method for generating a plurality of protected numbers (SN) only having a predetermined fixed length, protected numbers are formed at least by a number of identification (iN) and a control value (VC), said method allocating a protected number comprises the steps of: * determining a first amount of protected numbers to be generated; * Determining the minimum number of digits required to generate said first quantity of protected numbers; * Generating a first set of identification numbers (IN) unique, these identification numbers have a length at least equal to the minimum number of digits required to generate the protected numbers (SN), these identification numbers are selected from all numbers possible with the required length; * Association of a control value (VC) for each identification number (IN), this control value has a length such that the total length of the protected numbers corresponding to said predetermined fixed length, the control value (VC) is calculated from that iD number, a hidden information and a slide rule; * Prior use of all identification numbers of the first set of identification numbers, determining a second additional amount of protected that should generate numbers available; * Calculating the number of remaining identification numbers that can be generated from the number of digits forming the identification numbers of said first series; * If the second quantity of identification numbers to be generated is greater than said number of remaining numbers identification, determination of the new minimum number of digits required to generate said second number of identification numbers; * Determining at least one unused identification number from the identification numbers that can be generated using the number of digits of the first number of identification numbers; * Generating a second set of identification numbers (IN) unique, these identification numbers are formed from identification numbers unused between the identification numbers that can be generated using the number of digits of the first amount of numbers identification, these identification numbers of the second series of numbers has a length at least equal to the new minimum number of digits necessary to generate said identification number (iN) of this second series of numbers; * Choosing a single protected number among said plurality of unique numbers generated protected; and * printing said unique number chosen on physical media.