초록 ▼

The object requires a would-be user to supply an authorization code within a predetermined number of attempts, otherwise the object is invalidated. The object has at least one memory (1) in which the results of attempts at use are stored in permanent binary form. The object also includes memory writ

The object requires a would-be user to supply an authorization code within a predetermined number of attempts, otherwise the object is invalidated. The object has at least one memory (1) in which the results of attempts at use are stored in permanent binary form. The object also includes memory write means (3) and discriminator means (9). These are arranged to distinguish between an un-interrupted sequence of said predetermined number of failed attempts (in which case the object is invalidated) and a sequence of failed attempts which is interrupted by at least one successful attempt.

대표청구항 ▼

An individualized portable object which requires a user to supply an authorization code in order to use the object, and which includes memory means in which the results of attempts at use are stored permanently and irreversibly in binary form for the purpose of rendering the object invalid after a p

An individualized portable object which requires a user to supply an authorization code in order to use the object, and which includes memory means in which the results of attempts at use are stored permanently and irreversibly in binary form for the purpose of rendering the object invalid after a predetermined number of failed attempts at use, wherein the object further includes memory write means; and discriminator means for distinguishing an un-interrupted sequence of said predetermined number of failed attempts from a sequence of failed attempts including the same number of failed attempts but interrupted by at least one successful attempt for controlling said memory write means as a function of attempts at use prior to a current attempt and for invalidating the object only after an un-interrupted sequence of said predetermined number of failed attempts.