Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2006-09-19
2006-09-19
Smithers, Matthew (Department: 2137)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
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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Hein William
Rhoads Geoffrey B.
Digimarc Corporation
Digimarc Corporation
Smithers Matthew
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