The various embodiments described herein include methods and systems for determining user engagement with media content. In one aspect, a method is performed at a computer system. The method includes: (1) receiving, from a first device, media content identification information for media content presented during a time period; (2) receiving device usage information from a second device in proximity to the first device, the second device associated with a user and the usage information corresponding to device usage of the user during the time period; (3) based on the usage information and the identification information, determining a level of engagement of the user with the presented media content; and (4) if the level of engagement meets one or more predefined criterion, recommending additional media content to the user based on the presented media content.

A client device for media playback includes a user-installable media client application which implements the client-side of a digital rights management (DRM) system. The client device employs secure boot and verifies the user-installed application. The application is hardened against reverse engineering, and it utilizes a special API provided by the client device to tie into the secure boot, bridging the gap between the secure boot and the client-side of the DRM system contained within the application.

The invention is directed to just-in-time (JIT) retrieval of directory information to reduce network traffic and load on directory servers and/or data sources by requesting only the information that is currently needed from the directory server. In the invention, a request handler operating with the directory server provides this capability. Specifically, the request handler and directory server are configured to receive a request for directory information from a client and to determine a location corresponding to a set of current attribute values for responding to the request. The request handler retrieves the set of current attribute values from at least one of the following: the directory server and an external source. A set of current attributes is returned to the client from the directory server. The request handler propagates information in a JIT manner so that only the information that will be currently used by the client is propagated across the network.

A semiconductor package is provided, including a substrate having a top surface, a bottom surface opposing the top surface, a via communicating the top surface with the bottom surface, and a stator set formed by circuits; an axial tube axially installed in the via of the substrate; a plurality of electronic components mounted on the top surface of the substrate and electrically connected to the substrate; an encapsulant formed on the top surface of the substrate for encapsulating the electronic components and the axial tube; and an impeller axially coupled to the axial tube via the bottom surface of the substrate. In the semiconductor package, the stator set is formed in the substrate by a patterning process. Therefore, the thickness of the semiconductor package is reduced significantly.

Methods, systems, and computer programs for trusted communication among mobile devices are described. In some aspects, an authentication value is generated at a first mobile device based on a message and a shared secret value stored on the first mobile device. In response to detecting proximity of a second mobile device, the message and the authentication value are wirelessly transmitted from the first mobile device to the second mobile device. In some implementations, the message and the authentication value can be wirelessly transmitted by a proximity-activated wireless interface, such as, for example, a Near Field Communication (NFC) interface.

A system and a method are disclosed for a content delivery system that enable system-independent, remote storing of digital content on any number of a user's devices. The system and method enable a user to designate a digital content item appearing in a web page for storage, as well as a specific, separate device on which to store the content item. The digital content item is not restricted to being viewed or accessed within the content delivery system, but rather the content delivery system enables remote storing of digital content across multiple different systems, from multiple different content sources, for viewing on multiple different devices for any given user.

A system and a method are disclosed for a content delivery system that enable system-independent, remote storing of digital content on any number of a user's devices. The system and method enable a user to designate a digital content item appearing in a web page for storage, as well as a specific, separate device on which to store the content item. The digital content item is not restricted to being viewed or accessed within the content delivery system, but rather the content delivery system enables remote storing of digital content across multiple different systems, from multiple different content sources, for viewing on multiple different devices for any given user.

The various embodiments described herein include methods and systems for determining user engagement with media content. In one aspect, a method is performed at a computer system. The method includes: (1) receiving, from a first device, media content identification information for media content presented during a time period; (2) receiving device usage information from a second device in proximity to the first device, the second device associated with a user and the usage information corresponding to device usage of the user during the time period; (3) based on the usage information and the identification information, determining a level of engagement of the user with the presented media content; and (4) if the level of engagement meets one or more predefined criterion, recommending additional media content to the user based on the presented media content.

A system for performing a key exchange using a quantum key distribution protocol between first, second, and intermediary devices, wherein the intermediary device: receives first symbol set over a first quantum channel transmitted from first device and sends first receiving basis information to first device, receives second symbol set over a second quantum channel transmitted from second device and sends second receiving basis information to second device, generates first and second intermediate sets of symbols based on received first and second sets of symbols, generates third intermediate symbol set by combining first and second intermediate sets and sends third intermediate set to first and/or second device, whereby first and second devices perform the key exchange by exchanging with themselves first and second transmitting basis information and/or first and second receiving basis information to determine a final shared key based on first, second, and third intermediate symbol sets.

A method for receiving, by an ambient power (AMP) device that harvests environmental energy, an identification (ID) request frame from a powered wireless device. The ID request frame includes one or more frame-exchange parameters and an authentication and key management (AKM) method. The method includes retrieving, from memory, a secret that is shared with the powered wireless device, determining, using the secret, one or more first AKM parameters, and transmitting, to the powered wireless device, by the AMP device, an ID response frame including an ID of the AMP device, at least one of the one or more frame-exchange parameters and the one or more AKM parameters with which the powered wireless device is to be mutually authenticated with the AMP device and to generate an encryption key to initiate an encrypted wireless communication session.