Patent ID: 7293293
Filing Date: 2007-11-06
Classification: G06F,H04L

Abstract:
1. An apparatus for detecting illegitimate change of web resources comprising: a web resource protection processing sub-system for generating and inserting illegitimate change detecting information into a selected web resource, the illegitimate change detecting information being used to detect whether or not the web resource is changed illegitimately, wherein the web resource processing sub-system comprises: a user interface unit for selecting a target and external web resources linked thereto, to which the illegitimate change detecting process is to be performed, an encryption library unit having various encryption algorithms stored therein, for providing corresponding encryption algorithm in response to an external request, a ciphertext generating unit for generating a ciphertext of—each external web resource linked to the target which has been selected to be encrypted by the user interface, based on a predetermined encryption algorithm stored in the encryption library unit, wherein the ciphertext generating unit performs an encryption of an entire document or a portion of the document based upon a user's selection, the encryption being performed after the target and all of the external web resources have been selected by the user interface unit, a digital signature generating unit for generating a digital signature of a predetermined target and the selected web resources linked thereto, based on a predetermined encryption algorithm stored in the encryption library unit, and a web resource analyzing/processing unit for examining the selected target and external web resources linked to the selected target on which the illegitimate change detecting process is to be performed; for providing information on the resources to which the encryption is to be processed to the ciphertext generating unit; and for receiving the processing results from the digital signature generating unit and the ciphertext generating unit and inserting the illegitimate change detecting information into the selected target; and an illegitimate change detection file generating unit for detecting damage to the illegitimate change detecting information for the web resources and damage to the link pointing to the illegitimate change detecting information, from the target; and a web resource change detecting sub-system for judging whether or not the web resource is illegitimately changed, based on the illegitimate change detecting information contained in the web resource when the web resource is accessed using a communication network.