Patents by Inventor DeWitt Clinton Seward

DeWitt Clinton Seward has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11323239
    Abstract: A system and method for determining whether a cryptographic system is being observed for power consumption analysis in an attempt to decipher secret keys. The system comprises a first external connection to receive an input voltage, an internal voltage regulator with an external capacitor to produce the desired voltage for the cryptographic system. The internal voltage regulator typically includes a switch that passes current from the first external connection to the external capacitor. By monitoring the frequency at which the switch is activated, it is possible to detect that an external voltage is being applied to the external capacitor. This external voltage is typically used to perform SPA or DPA operations. Thus, the cryptographic system may cease performing any encryption or decryption operations if an external voltage is detected.
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: May 3, 2022
    Assignee: Silicon Laboratories Inc.
    Inventor: Dewitt Clinton Seward, IV
  • Patent number: 11012898
    Abstract: A system and method of allowing a new device to join an existing network are disclosed. A configuration tool is used to communicate relevant information from the new network device to the gateway in the existing network using a secondary network protocol different from that used by the primary network. For example, in one embodiment, messages are exchanged between the configuration tool and the new device and between the configuration tool and the gateway using BLUETOOTH®. Once all of the pertinent information has been exchanged, the new device is able to securely join the primary network, which may be based on the IEEE802.15.4 standard.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: May 18, 2021
    Assignee: Silicon Laboratories, Inc.
    Inventors: Wing Ming Cheung, DeWitt Clinton Seward, IV, Gregory Allan Hodgson, Rasmus Christian Larsen, Bernt Georg Breivik
  • Publication number: 20200382272
    Abstract: A system and method for determining whether a cryptographic system is being observed for power consumption analysis in an attempt to decipher secret keys. The system comprises a first external connection to receive an input voltage, an internal voltage regulator with an external capacitor to produce the desired voltage for the cryptographic system. The internal voltage regulator typically includes a switch that passes current from the first external connection to the external capacitor. By monitoring the frequency at which the switch is activated, it is possible to detect that an external voltage is being applied to the external capacitor. This external voltage is typically used to perform SPA or DPA operations. Thus, the cryptographic system may cease performing any encryption or decryption operations if an external voltage is detected.
    Type: Application
    Filed: August 20, 2020
    Publication date: December 3, 2020
    Inventor: DeWitt Clinton Seward, IV
  • Patent number: 10785016
    Abstract: A system and method for determining whether a cryptographic system is being observed for power consumption analysis in an attempt to decipher secret keys. The system comprises a first external connection to receive an input voltage, an internal voltage regulator with an external capacitor to produce the desired voltage for the cryptographic system. The internal voltage regulator typically includes a switch that passes current from the first external connection to the external capacitor. By monitoring the frequency at which the switch is activated, it is possible to detect that an external voltage is being applied to the external capacitor. This external voltage is typically used to perform SPA or DPA operations. Thus, the cryptographic system may cease performing any encryption or decryption operations if an external voltage is detected.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: September 22, 2020
    Assignee: Silicon Laboratories, Inc.
    Inventor: DeWitt Clinton Seward
  • Patent number: 10771942
    Abstract: A system and method of allowing a network device to receive a customized version of a reference design is disclosed. In one embodiment, many values that may be subject to customization are no longer fixed by the reference design. Rather, the reference design utilizes rewritable non-volatile memory to store a set of customization values that can be changed, based on a customer's preference. The system also includes a configuration tool, which interfaces with the network device. Using vendor-unique commands, the configuration tool is able to initialize this set of customization values to the values requested by the customer. In operation, the reference design is downloaded into the network device. The configuration tool is then used to establish the customized parameters for a particular customer. This process allows the manufacturer to create one reference design, which can be customized without the need to modify the code or recompile the source code.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: September 8, 2020
    Assignee: Silicon Laboratories, Inc.
    Inventors: DeWitt Clinton Seward, IV, Clayton Hollis Daigle, Gregory Allan Hodgson
  • Publication number: 20200036509
    Abstract: A system and method for determining whether a cryptographic system is being observed for power consumption analysis in an attempt to decipher secret keys. The system comprises a first external connection to receive an input voltage, an internal voltage regulator with an external capacitor to produce the desired voltage for the cryptographic system. The internal voltage regulator typically includes a switch that passes current from the first external connection to the external capacitor. By monitoring the frequency at which the switch is activated, it is possible to detect that an external voltage is being applied to the external capacitor. This external voltage is typically used to perform SPA or DPA operations. Thus, the cryptographic system may cease performing any encryption or decryption operations if an external voltage is detected.
    Type: Application
    Filed: July 25, 2018
    Publication date: January 30, 2020
    Inventor: DeWitt Clinton Seward, IV
  • Patent number: 10542585
    Abstract: A system and method for allowing legacy devices to be discovered on a DotDot network is disclosed. The system includes a gateway device to interface between DotDot devices and legacy devices. In some embodiments, the gateway device has a plurality of network interfaces to communicate with these legacy devices. The gateway device discovers the legacy devices that it can communicate with. The gateway device then presents information about these legacy devices in a Resource Directory. In some embodiments, the Resource Directory is maintained within the gateway device. In other embodiments, the gateway device utilizes a Resource Directory that exists on the DotDot network.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: January 21, 2020
    Assignee: Silicon Laboratories, Inc.
    Inventors: DeWitt Clinton Seward, Preston Fick, Clay Daigle, Greg Hodgson, Lee Byrd
  • Patent number: 10447822
    Abstract: A system and method for allowing legacy devices to operate on a DotDot network is disclosed. The system includes a gateway device to interfaces between DotDot devices and legacy devices. In some embodiments, the gateway has a plurality of network interfaces to communicate with these devices. The gateway discovers the legacy devices that it can communicate with. The gateway device than enumerates these legacy devices in a manner that allows them to be accessed by the DotDot device. In certain embodiments, the gateway enumerates each legacy device as a DotDot endpoint.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: October 15, 2019
    Assignee: Silicon Laboratories, Inc.
    Inventor: DeWitt Clinton Seward
  • Patent number: 10396910
    Abstract: A system and method of allowing a network device to enter RF test mode without changing the software image or attaching cables to it is disclosed. In one embodiment, the software image loaded into the network device has the capability to execute in both normal operating mode and RF test mode. A command is issued by a RF test tool which instructs the network device to enter one of one or more different RF modes. In certain embodiments, the network device remains in this RF test mode for a predetermined period of time. In other embodiments, the network device remains in this RF test mode until the power is cycled.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: August 27, 2019
    Assignee: Silicon Laboratories, Inc.
    Inventors: DeWitt Clinton Seward, IV, Clayton Hollis Daigle
  • Publication number: 20190098701
    Abstract: A system and method for allowing legacy devices to operate on a IPv6 network is disclosed. The system includes a gateway device to interfaces between DotDot devices and legacy devices. In some embodiments, the gateway device has a plurality of network interfaces to communicate with these legacy devices. The gateway device discovers the legacy devices that it can communicate with. The gateway device then enumerates these legacy devices in a manner that allows them to be accessed by the DotDot device. In certain embodiments, the gateway device enumerates each legacy device as a unique IPv6 address.
    Type: Application
    Filed: September 27, 2017
    Publication date: March 28, 2019
    Inventors: DeWitt Clinton Seward, Greg Hodgson, Clay Daigle, Preston Fick, John Hemmick
  • Publication number: 20190097842
    Abstract: A system and method for allowing legacy devices to operate on an IPv4 network is disclosed. The system includes a gateway device to interface between IPv4 devices and legacy devices. In some embodiments, the gateway device has a plurality of network interfaces to communicate with these legacy devices. The gateway device discovers the legacy devices that it can communicate with. The gateway device then enumerates these legacy devices in a manner that allows them to be accessible to the IPv4 device. In certain embodiments, the gateway enumerates each legacy device as a port on its IPv4 address.
    Type: Application
    Filed: September 27, 2017
    Publication date: March 28, 2019
    Inventors: DeWitt Clinton Seward, Greg Hodgson, Clay Daigle, Preston Fick, John Hemmick
  • Publication number: 20190098700
    Abstract: A system and method for allowing legacy devices to be discovered on a DotDot network is disclosed. The system includes a gateway device to interface between DotDot devices and legacy devices. In some embodiments, the gateway device has a plurality of network interfaces to communicate with these legacy devices. The gateway device discovers the legacy devices that it can communicate with. The gateway device then presents information about these legacy devices in a Resource Directory. In some embodiments, the Resource Directory is maintained within the gateway device. In other embodiments, the gateway device utilizes a Resource Directory that exists on the DotDot network.
    Type: Application
    Filed: September 27, 2017
    Publication date: March 28, 2019
    Inventors: DeWitt Clinton Seward, Preston Fick, Clay Daigle, Greg Hodgson, Lee Byrd
  • Publication number: 20190069148
    Abstract: A system and method of allowing a network device to receive a customized version of a reference design is disclosed. In one embodiment, many values that may be subject to customization are no longer fixed by the reference design. Rather, the reference design utilizes rewritable non-volatile memory to store a set of customization values that can be changed, based on a customer's preference. The system also includes a configuration tool, which interfaces with the network device. Using vendor-unique commands, the configuration tool is able to initialize this set of customization values to the values requested by the customer. In operation, the reference design is downloaded into the network device. The configuration tool is then used to establish the customized parameters for a particular customer. This process allows the manufacturer to create one reference design, which can be customized without the need to modify the code or recompile the source code.
    Type: Application
    Filed: November 1, 2018
    Publication date: February 28, 2019
    Inventors: DeWitt Clinton Seward, IV, Clayton Hollis Daigle, Gregory Allan Hodgson
  • Publication number: 20180367646
    Abstract: A system and method for allowing legacy devices to operate on a DotDot network is disclosed. The system includes a gateway device to interfaces between DotDot devices and legacy devices. In some embodiments, the gateway has a plurality of network interfaces to communicate with these devices. The gateway discovers the legacy devices that it can communicate with. The gateway device than enumerates these legacy devices in a manner that allows them to be accessed by the DotDot device. In certain embodiments, the gateway enumerates each legacy device as a DotDot endpoint.
    Type: Application
    Filed: June 19, 2017
    Publication date: December 20, 2018
    Inventor: DeWitt Clinton Seward
  • Patent number: 10154394
    Abstract: A system and method of allowing a network device to receive a customized version of a reference design is disclosed. In one embodiment, many values that may be subject to customization are no longer fixed by the reference design. Rather, the reference design utilizes rewritable non-volatile memory to store a set of customization values that can be changed, based on a customer's preference. The system also includes a configuration tool, which interfaces with the network device. Using vendor-unique commands, the configuration tool is able to initialize this set of customization values to the values requested by the customer. In operation, the reference design is downloaded into the network device. The configuration tool is then used to establish the customized parameters for a particular customer. This process allows the manufacturer to create one reference design, which can be customized without the need to modify the code or recompile the source code.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: December 11, 2018
    Assignee: Silicon Laboratories, Inc.
    Inventors: DeWitt Clinton Seward, IV, Clayton Hollis Daigle, Gregory Allan Hodgson
  • Publication number: 20180199246
    Abstract: A system and method of allowing a new device to join an existing network are disclosed. A configuration tool is used to communicate relevant information from the new network device to the gateway in the existing network using a secondary network protocol different from that used by the primary network. For example, in one embodiment, messages are exchanged between the configuration tool and the new device and between the configuration tool and the gateway using BLUETOOTH®. Once all of the pertinent information has been exchanged, the new device is able to securely join the primary network, which may be based on the IEEE802.15.4 standard.
    Type: Application
    Filed: October 27, 2016
    Publication date: July 12, 2018
    Inventors: Wing Ming Cheung, DeWitt Clinton Seward, IV, Gregory Allan Hodgson, Rasmus Christian Larsen, Bernt Georg Breivik
  • Publication number: 20180115372
    Abstract: A system and method of allowing a network device to enter RF test mode without changing the software image or attaching cables to it is disclosed. In one embodiment, the software image loaded into the network device has the capability to execute in both normal operating mode and RF test mode. A command is issued by a RF test tool which instructs the network device to enter one of one or more different RF modes. In certain embodiments, the network device remains in this RF test mode for a predetermined period of time. In other embodiments, the network device remains in this RF test mode until the power is cycled.
    Type: Application
    Filed: October 26, 2016
    Publication date: April 26, 2018
    Inventors: DeWitt Clinton Seward, IV, Clayton Hollis Daigle
  • Publication number: 20180115856
    Abstract: A system and method of allowing a network device to receive a customized version of a reference design is disclosed. In one embodiment, many values that may be subject to customization are no longer fixed by the reference design. Rather, the reference design utilizes rewritable non-volatile memory to store a set of customization values that can be changed, based on a customer's preference. The system also includes a configuration tool, which interfaces with the network device. Using vendor-unique commands, the configuration tool is able to initialize this set of customization values to the values requested by the customer. In operation, the reference design is downloaded into the network device. The configuration tool is then used to establish the customized parameters for a particular customer. This process allows the manufacturer to create one reference design, which can be customized without the need to modify the code or recompile the source code.
    Type: Application
    Filed: October 26, 2016
    Publication date: April 26, 2018
    Inventors: DeWitt Clinton Seward, IV, Clayton Hollis Daigle, Gregory Allan Hodgson
  • Patent number: 8000288
    Abstract: A method for monitoring a wireless network includes, at a device including a communication interface coupling the device to a wireless network, monitoring messages transmitted between the communication interface and the wireless network, and outputting monitoring data associated with the monitored messages from the device.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: August 16, 2011
    Assignee: Ember Corporation
    Inventors: Andrew James Wheeler, Dewitt Clinton Seward, IV, Jonathan Everett Avey
  • Patent number: 7782813
    Abstract: A method for monitoring a wireless network includes, at a device including a communication interface coupling the device to a wireless network, monitoring messages transmitted between the communication interface and the wireless network, and outputting monitoring data associated with the monitored messages from the device.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: August 24, 2010
    Assignee: Ember Corporation
    Inventors: Andrew James Wheeler, Dewitt Clinton Seward, IV, Jonathan Everett Avey