Patent ID: 7210035
Filing Date: 2007-04-24
Classification: H04L

Abstract:
1. A computer readable medium containing a computer program product for providing security with respect to who provided digital data at what time, the computer readable medium comprising: program code for performing a serially chained certification process comprising: a) forming a first interval certification at a first server including the server's identification, the start time of an interval chain in Coordinated Universal Time, the start time of the interval in Coordinated Universal Time, the shop time of the interval, a public key for the interval, a digital signature for the interval, signed by a previous interval's private key, and a digital signature for the interval, signed by the interval's private key; b) upon expiration of the first interval, destroying its private key; c) continuing steps (a) and (b) for second, third, and following intervals so that intervals are cross-chained with other servers to form a widely witnessed, temporal web of signed intervals of time; and encoding certification information in graphical form to form an indicia that relates to the authenticity of the document.