New patents are issued by the USPTO on Tuesdays. Both of this week's Spotlight Patents concern aspects of digital fingerprinting. Assigned to Viasat, the first patent addresses techniques for improving utilization of a communications system (e.g., a satellite communications system) are provided, using techniques referred to herein as "deltacasting." Assigned to Palo Alto Networks, the second patent addresses techniques for detecting repackaged applications based on file format fingerprints.
10,547,655, "Deltacasting," assigned to Viasat, Inc.
Methods, apparatuses, and systems for improving utilization of a communications system (e.g., a satellite communications system) are provided, using techniques referred to herein as "deltacasting." Embodiments operate in a client-server context, in which the server-side of the communication link intercepts requests and responses using a client-server optimizer (e.g., a transparent proxy or in-line optimizer between a client web browser and an Internet content provider). The optimizer uses techniques, such as dictionary coding techniques, to create fingerprints of content traversing the links of the communications system. These fingerprints are used to identify and exploit multicasting and/or other opportunities for increased utilization of the communications links.
10,547,626, "Detecting repackaged applications based on file format fingerprints," assigned to Palo Alto Networks.
Examining applications for structural indications of repackaging is disclosed. A mobile application is received. The mobile application is analyzed to determine whether the mobile application matches a build-related file format fingerprint indicative of application repackaging. In response to a result of the analysis, the mobile application is categorized as a repackaged application.