Patent ID: 9338162
Filing Date: 2016-05-10
CPC Classification: G06F,H04L

Claim Text:
1. A method for determining if a user of a computer system is a human, the method comprising the steps of: receiving, by one or more processors, an indication that a computer security program is needed, and in response, 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, wherein the first substitute character is a different character than any of the second set of one or more characters; presenting, by the one or more processors, the at least one image, an indication of the first substitute character and an indication of when to use the first substitute character to the user; receiving, by the one or more processors, a second string of characters from the user; and 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 in response, determining whether the user of the computer system is a human.