Test for distinguishing between a human and a computer program

A system for distinguishing between a human and a computer program, the system comprising a client device and a server;

• wherein the client device is configured for:
• providing a first output for indicating a set of one or more graphical entities;
• displaying an image comprising an arrangement of a plurality of graphical entities, wherein the graphical entities of the image comprise at least the set of one or more graphical entities indicated by the first output, and wherein one or more of the graphical entities of the image are obfuscated;
• and
• receiving an input for selecting one or more points on the image;
• wherein the server is configured for:
• comparing the selected points with position information indicating the positions in the image of the set of one or more graphical entities indicated by the first output;
• and
• determining that the received input has been made by a human if the selected points correspond to the position information.

A client device for distinguishing between a human and a computer program, the client device comprising:

• a receiver for receiving test information comprising an output and an image, the output for indicating a set of one or more graphical entities, the image comprising an arrangement of a plurality of graphical entities, wherein the graphical entities of the image comprise at least the set of one or more graphical entities indicated by the first output, and wherein one or more of the graphical entities of the image are obfuscated;
• an output unit for providing the first output;
• a display for displaying the image;
• an input unit for receiving an input for selecting one or more points on the image;
• and
• a transmitter for transmitting test response information comprising positions of the selected points.

A server for distinguishing between a human and a computer program, the server comprising:

• a transmitter for transmitting test information comprising an output and an image, the output for indicating a set of one or more graphical entities, the image comprising an arrangement of a plurality of graphical entities, wherein the graphical entities of the image comprise at least the set of one or more graphical entities indicated by the first output, and wherein one or more of the graphical entities of the image are obfuscated;
• a receiver for receiving test response information comprising information indicating one or more selected points on the image;
• and
• a test response analysing unit for comparing the selected points with position information indicating the positions in the image of the set of one or more graphical entities indicated by the first output, and for determining that the selected points have been selected by a human if the selected points correspond to the position information.

A method for distinguishing between a human and a computer program, comprising:

• receiving test information comprising an output and an image, the output for indicating a set of one or more graphical entities, the image comprising an arrangement of a plurality of graphical entities, wherein the graphical entities of the image comprise at least the set of one or more graphical entities indicated by the first output, and wherein one or more of the graphical entities of the image are obfuscated;
• providing the first output;
• displaying the image;
• receiving an input for selecting one or more points on the image;
• transmitting test response information comprising positions of the selected points.

A method for distinguishing between a human and a computer program, comprising:

• transmitting test information comprising an output and an image, the output for indicating a set of one or more graphical entities, the image comprising an arrangement of a plurality of graphical entities, wherein the graphical entities of the image comprise at least the set of one or more graphical entities indicated by the first output, and wherein one or more of the graphical entities of the image are obfuscated;
• receiving test response information comprising information indicating one or more selected points on the image;
• comparing the selected points with position information indicating the positions in the image of the set of one or more graphical entities indicated by the first output;
• and
• determining that the selected points have been selected by a human if the selected points correspond to the position information.