Authenticatable graphical bar codes

Details Authenticatable graphical bar codes Authenticatable graphical bar codes

2006-09-12

2006-09-12

Moise, Emmanuel L. (Department: 2137)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C380S054000, C382S183000, C382S234000

Reexamination Certificate

active

07107453

ABSTRACT:
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.

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