US 6,148,406 AGranted

Access control password generated as a function of random numbers

OwnerHerman Weisz, Ornella Lo Pianoinventors

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Abstract

A method and a security system for applying this method, for securing a device by making use of a security system equipped with a logic control device (1), includes assigning a personal code Y to each user, who from such code Y and from a series Ai of at least a random number, letter and/or symbol determines a password Z, and enters this password Z in the logic control device, and where access to the secured device is granted when the password Z is correctly entered, whereby the personal code is used having at least two distinct parts, whereby a first part is formed by an index I and a second part is formed by a figure code X, whereby the user of this index I determines which element out of series is used to form the password Z out of the figure code X by an operation or a function.

Claims10

Dependent claims

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.

7 more elements

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;
and
(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;
characterized in that:
before entering a number Zi of said password Z, a series of numbers Ai with q random numbers Ai is generated with q>2;
at least one number of said series Ai is provided with a system index by said logic control device (1);
the user enters as Zi a number Zi=F(Aij.sub.i), where Aij.sub.i is the number with a system index j.sub.i from said random series Ai, where the index j.sub.i is a system index being known or made known to the user;
and
characterized in that the system index j.sub.i, forms part of a system index series Ji of k random indexes j.sub.1, j.sub.2, . . . j.sub.i, . . . j.sub.k, where the system indexes of said series Ji are symbols and/or numbers and/or letters, with 1.ltoreq.k.ltoreq.q, and correspond to a number Aij of the series Ai.

11 more elements

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;
and
(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;
characterized in that the personal index I consists of r elements i.sub.1, i.sub.2, . . . i.sub.i, . . . i.sub.r with r.gtoreq.2, and that for all Xi, Xi can be a positive or negative integer or decimal number or zero.

6 more elements

Dependencies are inferred from the claim text.