Authenticatable graphical bar codes
2000 (English)Patent (Other (popular science, discussion, etc.))
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
Research subject SRA - ICT
IdentifiersURN: urn:nbn:se:kth:diva-47856OAI: oai:DiVA.org:kth-47856DiVA: diva2:456465
US 7107453 (2006-09-12)
EP 1340188-B1 (2007-03-07); JP 4495908-B2 (2010-07-07)2011-11-142011-11-142013-09-09Bibliographically approved