Abstract: Chains of cryptographic certificates are used for server authentication in a recursive manner. A device requires a Root certificate to authenticate a server, where the Root certificate is changed periodically. Each Root certificate is signed using a prior Root certificate. When a device is required to perform an authentication, multiple Root certificates forming a chain are provided to the device. The device authenticates the first Root certificate in the chain using a previously stored Root certificate, and authenticates each other Root certificate in the chain using a prior Root certificate in the chain. Upon authenticating the last Root certificate in the chain, the authentication can be completed. An associated server is also provided. The device can store the last Root certificate in the chain for use in defining subsequent chains.

Abstract: A control system for use in a power converter having a plurality of outputs comprising a primary switching control block, a secondary control block, and a multi-output control block. The primary switching control block is coupled to control switching of a primary switch. The secondary control block is coupled to control switching of a synchronous rectifier switch. The multi-output control block is coupled to control switching of at least one pulse transfer switch coupled to one of the plurality of outputs. A request for an energy pulse is transferred to the primary switching control block to turn ON the primary switch to transfer the energy pulse to one of the plurality of outputs. The multi-output control block comprises an interface to send the request for the energy pulse and to receive an acknowledge signal to and from the secondary control block.

Abstract: A control system for use in a power converter having a plurality of outputs comprising a primary switching control block, a secondary control block, and a multi-output control block. The primary switching control block is coupled to control switching of a primary switch. The secondary control block is coupled to control switching of a synchronous rectifier switch. The multi-output control block is coupled to control switching of at least one pulse transfer switch coupled to one of the plurality of outputs. A request for an energy pulse is transferred to the primary switching control block to turn ON the primary switch to transfer the energy pulse to one of the plurality of outputs. The multi-output control block comprises an interface to send the request for the energy pulse and to receive an acknowledge signal to and from the secondary control block.

Abstract: A power converter includes a primary winding and multiple output windings to provide multiple independently controlled and regulated outputs with a common return line. The outputs are coupled to independently regulate constant current, constant voltage, or both constant current and constant voltage outputs. A secondary control block is coupled to control a synchronous rectifier switch coupled to the common return line to synchronize switching with a primary side power switch to provide complementary conduction of the primary winding and the multiple output windings. A plurality of controlled power pulse switches is coupled to the multiple output windings. A request of a power pulse from each of the outputs is transferred through the secondary control block to a primary switch control block to turn on the primary side power switch to transfer a power pulse to the multiple output windings and through controlled power pulse switches to the outputs.

Abstract: A power converter includes a primary winding and multiple output windings to provide multiple independently controlled and regulated outputs with a common return line. The outputs are coupled to independently regulate constant current, constant voltage, or both constant current and constant voltage outputs. A secondary control block is coupled to control a synchronous rectifier switch coupled to the common return line to synchronize switching with a primary side power switch to provide complementary conduction of the primary winding and the multiple output windings. A plurality of controlled power pulse switches is coupled to the multiple output windings. A request of a power pulse from each of the outputs is transferred through the secondary control block to a primary switch control block to turn on the primary side power switch to transfer a power pulse to the multiple output windings and through controlled power pulse switches to the outputs.

Abstract: There is provided methods and apparatuses for secure updating of firmware/software. The methods and apparatus can be enabled by making use of the Online Certificate Status Protocol (OCSP) to request the revocation status of certificates in the certificate chain. In particular, a method called ‘OCSP stapling’ can ensure the validity of the certificates or verify authenticity of the software/firmware. By virtue of features of the OCSP stapling, the user device does not need to contact CAs directly for the purpose of verifying the status of the certificates that ensure authenticity and integrity of the delivered software/firmware and thus is not required to open an extra communication channel to obtain status of certificates. This process can also reduce the burden on CAs because the CAs are neither required to keep a large volume of CRLs nor to maintain connection with user devices for which the CAs are responsible.

Abstract: A power converter includes a primary winding and multiple output windings to provide multiple independently controlled and regulated outputs with a common return line. The outputs are coupled to independently regulate constant current, constant voltage, or both constant current and constant voltage outputs. A secondary control block is coupled to control a synchronous rectifier switch coupled to the common return line to synchronize switching with a primary side power switch to provide complementary conduction of the primary winding and the multiple output windings. A plurality of controlled power pulse switches is coupled to the multiple output windings. A request of a power pulse from each of the outputs is transferred through the secondary control block to a primary switch control block to turn on the primary side power switch to transfer a power pulse to the multiple output windings and through controlled power pulse switches to the outputs.

Abstract: There is provided methods and apparatuses for secure updating of firmware/software. The methods and apparatus can be enabled by making use of the Online Certificate Status Protocol (OCSP) to request the revocation status of certificates in the certificate chain. In particular, a method called ‘OCSP stapling’ can ensure the validity of the certificates or verify authenticity of the software/firmware. By virtue of features of the OCSP stapling, the user device does not need to contact CAs directly for the purpose of verifying the status of the certificates that ensure authenticity and integrity of the delivered software/firmware and thus is not required to open an extra communication channel to obtain status of certificates. This process can also reduce the burden on CAs because the CAs are neither required to keep a large volume of CRLs nor to maintain connection with user devices for which the CAs are responsible.

Abstract: A power converter includes a primary winding and multiple output windings to provide multiple independently controlled and regulated outputs with a common return line. The outputs are coupled to independently regulate constant current, constant voltage, or both constant current and constant voltage outputs. A secondary control block is coupled to control a synchronous rectifier switch coupled to the common return line to synchronize switching with a primary side power switch to provide complementary conduction of the primary winding and the multiple output windings. A plurality of controlled power pulse switches is coupled to the multiple output windings. A request of a power pulse from each of the outputs is transferred through the secondary control block to a primary switch control block to turn on the primary side power switch to transfer a power pulse to the multiple output windings and through controlled power pulse switches to the outputs.

Abstract: A power converter includes a primary winding and multiple output windings to provide multiple independently controlled and regulated outputs with a common return line. The outputs are coupled to independently regulate constant current, constant voltage, or both constant current and constant voltage outputs. A secondary control block is coupled to control a synchronous rectifier switch coupled to the common return line to synchronize switching with a primary side power switch to provide complementary conduction of the primary winding and the multiple output windings. A plurality of controlled power pulse switches is coupled to the multiple output windings. A request of a power pulse from each of the outputs is transferred through the secondary control block to a primary switch control block to turn on the primary side power switch to transfer a power pulse to the multiple output windings and through controlled power pulse switches to the outputs.

Abstract: A power converter includes a primary winding and multiple output windings to provide multiple independently controlled and regulated outputs with a common return line. The outputs are coupled to independently regulate constant current, constant voltage, or both constant current and constant voltage outputs. A secondary control block is coupled to control a synchronous rectifier switch coupled to the common return line to synchronize switching with a primary side power switch to provide complementary conduction of the primary winding and the multiple output windings. A plurality of controlled power pulse switches is coupled to the multiple output windings. A request of a power pulse from each of the outputs is transferred through the secondary control block to a primary switch control block to turn on the primary side power switch to transfer a power pulse to the multiple output windings and through controlled power pulse switches to the outputs.

Abstract: The present invention provides methods, systems and computer program products for facilitating loading, configuration and interaction of modular applications and/or modular components of an application on wireless devices such as M2M terminals. Modular elements may be connected to each other based on a system of permissions which determines which elements are permitted to access given services offered by other elements. Once connected, modular elements may communicate directly via a standardized interface.

Abstract: The present invention provides methods, systems and computer program products for facilitating loading, configuration and interaction of modular applications and/or modular components of an application on wireless devices such as M2M terminals. Modular elements may be connected to each other based on a system of permissions which determines which elements are permitted to access given services offered by other elements.

Abstract: A portable sensor system that uses acceleration-insensitive, three-dimensional angle sensors located at various points on the patient's body, and collects data on the frequency and nature of the movements over extended periods of time.