Patent ID: 6065119
Filing Date: 2000-05-16
Classification: G06F,H04L,H04N

Abstract:
A method of validating digital data values comprising the steps of:calculating first data-metrics that measure said digital data values completely, or in parts;authenticating said digital data in the form of revisions made by data embedding methods to represent said digital data-metrics by means of modifications to said digital data values;calculating second data-metrics for said digital data values after said digital data values are transmitted, archived, or opened to unauthorized modification;constructing an independent version of said first data-metrics for said digital data values after said digital data values are transmitted, archived, or opened to unauthorized modification by means of constructing said first data-metrics using said data embedding methods;comparing said calculated second data-metric with said constructed independent version of said first data-metric to determine locations and amount of modifications or changes to said digital data values; andoutputting said locations and amount of modifications to said digital data values as verification quantities to a data port or file.