On Thursdays, the USPTO publishes new patent applications. Today's Spotlight applications address the use of watermarking and fingerprinting. Assigned to Colligo Networks, the first application discloses techniques for codeword-enhanced P2P authentication. The second application is another divisional (same specification, different claims) of the InterTrust trusted and secure item delivery (including e-mail) application (one of mine).
20080141034, "Codeword-enhanced peer-to-peer authentication," assigned to Colligo Networks, Inc. (CA).
Peer-to-peer authentication may be accomplished by sending a digital certificate to a responder, receiving a randomized codeword in response to the sending, creating a secure fingerprint based at least in part on the digital certificate and randomized codeword, creating a first bit sequence based at least in part on a first portion of the secure fingerprint and a second portion of the randomized codeword and indicating the first digital certificate is authenticated based upon whether the first bit sequence matches a second bit sequence received from the responder via an out-of-band communication in response to the sending. The size of the first bit sequence is less than the size of the secure fingerprint. According to another aspect, the first bit sequence is compared with a rendering of the second bit sequence, using an out-of-band communication, by associating the first bit sequence with one or more indices into an array of representations.
20080141033, "Trusted and secure techniques, systems and methods for item delivery and execution," assigned to InterTrust.
Documents and other items can be delivered electronically from sender to recipient with a level of trustedness approaching or exceeding that provided by a personal document courier. A trusted electronic go-between can validate, witness and/or archive transactions while, in some cases, actively participating in or directing the transaction. Printed or imaged documents can be marked using handwritten signature images, seal images, electronic fingerprinting, watermarking, and/or steganography. Electronic commercial transactions and transmissions take place in a reliable, "trusted" virtual distribution environment that provides significant efficiency and cost savings benefits to users in addition to providing an extremely high degree of confidence and trustedness. The systems and techniques have many uses including but not limited to secure document delivery, execution of legal documents, and electronic data interchange (EDI).