CAPTCHA CHALLENGE INCORPORATING OBFUSCATED CHARACTERS

摘要

A method for determining if a user of a computer system is a human. A processor receives an indication that a computer security program is needed and acquires at least one image depicting a first string of characters including at least a first and second set of one or more characters. A processor assigns a substitute character to be used as input for each of the second set of one or more characters. A processor presents the at least one image and an indication of the substitute character and when to use the substitute character to the user. A processor receives a second string of characters from the user. A processor determines whether the second string of characters substantially matches the first string of characters based on the substitute character assigned to each of the second set of one or more characters and determines whether the user is a human.

主权项

1. A method for determining if a user of a computer system is a human, the method comprising the steps of:
acquiring, by one or more processors, at least one image depicting a first string of characters including at least a first set of one or more characters and a second set of one or more characters; assigning, by the one or more processors, a first substitute character to be used as input for each of the second set of one or more characters; presenting, by the one or more processors, the at least one image to a user; receiving, by the one or more processors, a second string of characters from the user; determining, by the one or more processors, whether the second string of characters substantially matches, within a predetermined threshold, the first string of characters based on the first substitute character assigned to each of the second set of one or more characters; and determining, by the one or more processors, whether the user is a human based on whether the second string of characters substantially matches, within a predetermined threshold, the first string of characters.