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Authenticatable graphical bar codes
Hewlett-Packard Research Laboratory.
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS. (Computer Communications)ORCID iD: 0000-0002-6066-746X
Hewlett-Packard Research Laboratory.
Hewlett-Packard Research Laboratory.
2000 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

Systems and methods for generating and decoding authenticatable graphical bar codes are described. In one aspect, a corroborative signed message is generated from information to be encoded, and a base image is modulated with a graphical encoding of the signed message to produce a marked image. In another aspect, a signed message is extracted from a marked image based upon a comparison of the marked image and a base image. The extracted signed message is decoded to produce a decoded message. Information encoded in the marked image is extracted from the decoded message and authenticated.

Place, publisher, year, edition, pages
National Category
Computer Science
Research subject
URN: urn:nbn:se:kth:diva-47856OAI: diva2:456465
US 7107453 (2006-09-12)

EP 1340188-B1 (2007-03-07); JP 4495908-B2 (2010-07-07)

Available from: 2011-11-14 Created: 2011-11-14 Last updated: 2013-09-09Bibliographically approved

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Maguire Jr., Gerald Q.
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