Patent ID: 6148406
Filing Date: 2000-11-14
Classification: G06F

Abstract:
A method of providing access to a secured system equipped with a logic control device (1,2,3) for determining the identity of a user of the system, comprising the steps of:(a) providing the user with a secret personal code (Y) comprising an index portion (I) and a number code (X), the index portion consisting of at least one character and the number code consisting of a multi-digit number;(b) generating in and displaying on the logic control device a series (Ai) of random numbers (Aij);(c) determining, by the user, by means of an index element (Ii) of said index portion (I), a random number (Aij) in said displayed series, the index element designating the position of the random number being determined;(d) applying, by the user, a function and/or an operation (F) to said number (Aij) determined by said index (I) and to an element of said number code, so as to obtain a new number, which can be different from that determined by said index (I);(e) repeating the steps (c) and (d), all elements of said number code forming on the basis of said new elements a password Z;(f) entering said password Z in said logic control device;(g) controlling by means of said logic control device whether the correct password is entered, and giving access to the system secured by means of said logic control device if the correct password has been entered; and(h) using a personal code Y comprising an index operator B comprising at least one number making it possible to determine, with the help of the index I, which element from a series Ai of random elements Aij is used to form said password Z;(i) generating a series Ai of random numbers with an index series Ji, wherein an operation is carried out between a number b of said index operator B and a number Aij of said series Ai, said number Aij corresponding to an index j of said index series Ji, where said index j corresponds to an element of the index I and the result of this operation determines a new index element indicating the number in a series of random numbers on which an operation is then carried out with at least a number of the personal figure code X in order to calculate a number Zi of the password Z to be entered.