Patent ID: 6266680
Filing Date: 2001-07-24
Classification: H04L

Abstract:
A process of forming a document printed on a printable medium having an electronically-authenticity checking format utilized for electronic authentication, comprising the steps of:(a) obtaining a bit map image of said document to be electronically notarized, and using a mask to inspect the bit map image in a predetermined direction so as to form image information of said document consisting of a series of binary bit streams;(b) obtaining a hash value by applying a hash function to the image information;(c) storing a serial number of said document and the hash value into a database;(d) determining whether an on-line method or an off-line method is to be adopted for authenticating the notarization of said document;(e) encrypting the hash value using either a customary encrypting method when said on-line method is adopted for authenticating the notarization of said document, or an opening key encrypting method when said off-line method is adopted for authenticating the notarization of said document; and(f) forming said document with said electronically authenticity-checking format containing the serial number of said document, the hash value and the encrypted hash value.