Distributed system for responding to watermarked documents

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique

Reexamination Certificate

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C713S179000, C283S072000

Reexamination Certificate

active

07111170

ABSTRACT:
A method and system that registers data carried by a watermark with a server, reads watermark data from a document and generates an action string if a watermark read from a document matches registered data. In one embodiment the system includes two servers. Registration is done on one server via the internet the registration data is sent to a second server. The second server is interrogated via a local area network (LAN) to determine if particular watermark data is registered. The LAN allows data carried on documents such as tickets to be authenticated very quickly. In a second embodiment, there are multiple registration servers, each of which registers a different sets of watermark data. The compartmentalization of data increases security and privacy of data.

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