On Tuesdays the USPTO issues new patents. Today's Spotlight Patents concern aspects of digital fingerprinting and digital watermarking. Assigned to The 41st Parameter, Inc, the first patent addresses techniques for detecting session tampering and fraud prevention. Assigned to Konica Minolta, the second patent addresses a method of embedding data in original image with reduced effect on visibility of original image.
8,151,327, "Systems and methods for detection of session tampering and fraud prevention," assigned to The 41st Parameter, Inc.
The invention provides methods and apparatus for detecting when an online session is compromised. A plurality of device fingerprints may be collected from a user computer that is associated with a designated Session ID. A server may include pages that are delivered to a user for viewing in a browser at which time device fingerprints and Session ID information are collected. By collecting device fingerprints and session information at several locations among the pages delivered by the server throughout an online session, and not only one time or at log-in, a comparison between the fingerprints in association with a Session ID can identify the likelihood of session tampering and man-in-the middle attacks.
8,149,466, "Method of embedding data in original image with reduced effect on visibility of original image," assigned to Konica Minolta Business Technologies, Inc. (JP)
A PC generating image data divides data to be embedded into a predetermined size and arranges it in a predetermined area of a watermarking image. In the predetermined area are defined positions a-h assumed by an information dot configuring an information pattern based on the data to be embedded, and, of positions a-h, a position defined for the information pattern is assumed by a point dot. Of positions a-h, a position that is not defined for the information pattern is assumed by a linear dot. Furthermore in the predetermined area there is a position assumed by a positioning dot defining the predetermined area, and this position is assumed by a point dot. The linear dot has a geometry extending in one of the main scanning direction and vertical scanning direction of an image formation apparatus that allows higher performance in reproducibility for a line.