Abstract: A method for providing adaptive radio transmit power based on antenna pattern and elevation tilt measured through an accelerometer is provided. The method includes estimating an orientation of a wireless device using an orientation sensor integrated in or on the wireless device, and determining an adjustment factor for a transmitter of the wireless device based on the orientation. The method further includes adjusting output power of the transmitter of the wireless device based on the adjustment factor.

Abstract: A method for adaptive presence-based radio configuration of access points in a venue includes defining a number of regions in the venue in which access points are deployed, each region having a center point, and assigning a first access point to a first region, positioned at the center of the first region. The method also includes affecting a first energy level in the first region, which corresponds to a power of a transmit signal emitted by the first access point, and assigning to the first region a configurable capacity value that determines an acceptable overlap constraint between the first energy level of the first region and an energy level of a neighboring region. The method further includes generating data describing a tessellation graph in which a possible map of the access points is formed using an iterative descent process based on the first energy level and the overlap constraint.

Abstract: A secure cloud-based node-locking service with built-in attack detection to eliminate fuzzing, cloning and other attacks is disclosed. White-box base files are securely stored on the cloud service and are not vulnerable to accidental leakage. A secure cloud-based dynamic secret encoding service reduces the risk of exposure of unprotected secrets and other sensitive data.

Abstract: A gaseous fuel-air mixer includes an outer shell, an inner shell, and a fuel chamber rib. The outer shell includes an air intake and a fuel intake. The air intake is configured to receive air. The air intake has an air outlet. The fuel intake has a fuel inlet that is configured to receive fuel. The inner shell includes an inner shell intake that is configured to separately receive the air from the air outlet and the fuel from the fuel intake and to provide a gaseous fuel-air mixture. The inner shell cooperates with the outer shell to define a fuel intake collecting chamber that is configured to receive the fuel from the fuel inlet and a fuel intake concentrating chamber that is configured to receive the fuel from the fuel intake collecting chamber and provide the fuel to the inner shell intake.

Abstract: Methods, apparatus, systems, and articles of manufacture of valve packing apparatus and related methods. An apparatus includes a cartridge including packing components and a spring. The cartridge is dimensioned to fit in a bore of a bonnet of a valve. A retainer is disposed in an aperture of the cartridge. The retainer is removable from the aperture to release the spring to apply a predetermined compressive load to the stack of packing components.

Abstract: Methods, apparatus, systems, and articles of manufacture of valve packing apparatus and related methods are described. An apparatus includes a cartridge including packing components and a spring. The cartridge is dimensioned to fit in a bore of a bonnet of a valve. A cap is coupled to the cartridge to retain the packing components and the spring. The cap is to compress the packing components and the spring to a predetermined load in response to the cartridge being fastened to the bonnet of a valve.

Abstract: An ear-worn electronic hearing device comprises an enclosure configured to be supported by, at, in or on an ear of the wearer. Electronic circuitry is disposed in the enclosure and comprises a wireless transceiver. An antenna is disposed in or on the enclosure and operably coupled to the wireless transceiver. The antenna has a physical size and comprises a plurality of cutouts disposed along a periphery of the antenna. The cutouts are configured to increase an electrical length of the antenna without an increase in the physical size of the antenna. The antenna can comprise at least one interior window having a window periphery. A plurality of window cutouts are disposed along the window periphery. The window cutouts are configured to increase a path length of current distribution along the window periphery.

Abstract: A flow control device has a valve body having an inlet, an outlet, and a flow path connecting the inlet and the outlet and a unitary trim cartridge assembly secured to the valve body. The trim cartridge assembly has a cage disposed in the flow path, a bonnet coupled to the cage, and a retaining element disposed between the cage and the bonnet. The cage includes an exterior groove formed on an exterior surface of the cage, the bonnet includes an interior groove formed on an interior surface of the bonnet, and the retaining element extends into the interior groove and the exterior groove. A height of the interior groove and/or a height of the exterior groove is greater than a height of the retaining element to allow the cage to move longitudinally within the bonnet with the bonnet and cage assembled.

Abstract: A method is provided for obfuscating program code to prevent unauthorized users from accessing video. The method includes receiving an original program code that provides functionality. The original program code is transformed into obfuscated program code defining a randomized branch encoded version of the original program code. The obfuscated program code is then stored, and a processor receiving input video data flow uses the obfuscated program code to generate an output data flow.

Abstract: A method is provided for obfuscating program code to prevent unauthorized users from accessing video. The method includes receiving an original program code that provides functionality. The original program code is transformed into obfuscated program code defining a randomized branch encoded version of the original program code. The obfuscated program code is then stored, and a processor receiving input video data flow uses the obfuscated program code to generate an output data flow.

Abstract: A system and method for authenticating an application that employs cryptographic keys and functions is provided with white box cryptography employed to secure the application, and to secure communications with the application. The white box includes a transformation of the application and the keys. A secure channel between the white box and a crypto token is used for communications. In some cases, the transformed keys can be employed in authenticating the white box to the crypto token. The presence of a valid crypto token can be periodically determined. In the presence of a valid crypto token, the white box can provide a verifiable message to a remote server. The remote server can verify the message and initiate a service.

Abstract: A fully homomorphic white-box implementation of one or more cryptographic operations is presented. This method allows construction of white-box implementations from general-purpose code without necessitating specialized knowledge in cryptography, and with minimal impact to the processing and memory requirements for non-white-box implementations. This method and the techniques that use it are ideally suited for securing “math heavy” implementations, such as codecs, that currently do not benefit from white-box security because of memory or processing concerns. Further, the fully homomorphic white-box construction can produce a white-box implementation from general purpose program code, such as C or C++.

Abstract: Various embodiments are directed to an ear-worn electronic device configured to be worn by a wearer. The device comprises an enclosure configured to be supported by or in an ear of the wearer. Electronic circuitry is disposed in the enclosure and comprises a wireless transceiver. An antenna is situated in or on the enclosure and coupled to the wireless transceiver. The antenna comprises a first antenna element, a second antenna element, and a strap comprising a reactive component connected to the first and second antenna elements.

Abstract: A fully homomorphic white-box implementation of one or more cryptographic operations is presented. This method allows construction of white-box implementations from general-purpose code without necessitating specialized knowledge in cryptography, and with minimal impact to the processing and memory requirements for non-white-box implementations. This method and the techniques that use it are ideally suited for securing “math heavy” implementations, such as codecs, that currently do not benefit from white-box security because of memory or processing concerns. Further, the fully homomorphic white-box construction can produce a white-box implementation from general purpose program code, such as or C++.

Abstract: A method is provided for generating an output from an input according to a secret using a white-box implementation of a cryptographic function having a first operation, a second operation, and a third operation. The method applies the input to a first operation to generate a first intermediate result, applies the first intermediate result to a second operation to generate a second intermediate result, and applies the second intermediate result to a third operation to generate the output, wherein at least two of the first operation, the second operation, and the third operation is implemented by a plurality of interconnected logic elements, the interconnection of the plurality of logic elements being comprised of one of a non-algebraic interconnection of logic elements and an algebraic interconnection of logic elements having obfuscated boundaries between the at least one of the first operation, the second operation and the third operation.

Abstract: A secure cloud-based node-locking service with built-in attack detection to eliminate fuzzing, cloning and other attacks is disclosed. White-box base files are securely stored on the cloud service and are not vulnerable to accidental leakage. A secure cloud-based dynamic secret encoding service reduces the risk of exposure of unprotected secrets and other sensitive data.

Abstract: A method and apparatus for securely generating an output is disclosed. In one embodiment, the method comprises generating a white-box implementation having unlocked white-box look up table (LUTs) for node-encoded secrets, the node-encoded secrets to be encoded for operation solely on a node of a network and globally encoded white-box LUTs for globally-encoded secrets to be encoded for operation on the node and at least another node; generating, from the white box implementation, a soft-locked white-box implementation having a plurality of node-specific locked white-box LUTs and modified globally encoded LUTs. The method further comprises receiving a global secret encoded according to the base file; generating the node-encoded secrets by applying node-specific locking transformations to the global secret; and generating, by the node, the output according to at least one of the globally-encoded secrets or the node-encoded secrets.

Abstract: Various embodiments are directed to an ear-worn electronic device configured to be worn by a wearer. The device comprises an enclosure configured to be supported by or in an ear of the wearer. Electronic circuitry is disposed in the enclosure and comprises a wireless transceiver. An antenna is situated in or on the enclosure and coupled to the wireless transceiver. The antenna comprises a first antenna element, a second antenna element, and a strap comprising a reactive component connected to the first and second antenna elements.

Abstract: Embodiments are directed to an ear-worn electronic device configured to be worn by a wearer. The device comprises an enclosure configured to be supported at, by, in or on the wearer's ear. A processor is disposed in the enclosure. A speaker or a receiver is coupled to the processor. A radio frequency transceiver is disposed in the enclosure and coupled to the processor. An antenna is disposed in or on the enclosure. A magnetically coupled feed arrangement comprises a separable transformer. The separable transformer comprises a first coil coupled to the antenna and a second coil coupled to the transceiver, wherein the second coil is physically and electrically separated from the first coil. The feed arrangement is configured to feed the antenna via mutual inductance between the first and second coils.