Patent ID: 9736148
Date: 2017-08-15
CPC Classifications: G06F,H04L

Claim:
1. A method for approving access from a user location having a computer terminal of a user to a computer network or web resource on a server system comprising: initiating an access request for an access session by the computer terminal of the user location on a communications link between the server system and the computer terminal; in response to the access request, sending to the user location a clue table image containing on the image a pattern of characters, the image for the access session being different from images generated for previous sessions; displaying said image including the pattern of characters to said user; to commence a session, causing said user to compute from the image a response; causing said user to enter the response into the computer terminal for communication to the server system; comparing said response received with an expected response computed from said image; and selectively providing access by the user to said server system on said communication link for said session in conformity with a matching result of said comparing; and sending an access approval/denial for the server system or web resource to the computer terminal; wherein the image is communicated to the user location from a server separate from said server system so that the communication of the image is effected on a communications link different from the communication link between the terminal and said servers system and wherein the different communications link uses https:/ internet protocol; and wherein the response is computed by firstly selecting a selected set of the characters in the image by determining the location in the image of the characters based on a predetermined pattern of the characters in the image and secondly by carrying out an operation on the selected set.