Patent ID: 7975143
Filing Date: 2011-07-05
Classification: G06F,G06Q,H04L

Abstract:
1. A method for generating digital signatures, comprising: accessing an electronic document having at least one user interface control (UIC) using a computer device; confirming, for each UIC, whether the UIC is operationally classified as signed by a digital signature being generated based on whether the UIC is associated with a data node that is included in the signed material of the signature; determining, for each signed UIC, whether the signed UIC is visible by combining local visibility information with a hierarchic UIC's visibility information, wherein said hierarchic UIC contains the signed UIC; converting the location of each visible UIC contained within any hierarchic UIC from a geometric location within any containing hierarchic UIC to the geometric location within the visual representation; recording, after the converting step, within a cryptographically protected portion of the digital signature a layout token, wherein the layout token represents a geometric size of each visible signed UIC within a visual representation of the electronic document and a location of each visible signed UIC relative to other visible signed UICs in the electronic document; and generating the digital signature unless a UIC overlap violation is committed.