Patents by Inventor Alec Woo

Alec Woo 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: 9735957
    Abstract: According to one embodiment, techniques are provided to enable secure communication among devices in a mesh network using a group temporal key. An authenticator device associated with a mesh network stores a pairwise master key for each of a plurality of devices in a mesh network upon authentication of the respective devices. Using the pairwise master key, the authenticator device initiates a handshake procedure with a particular device in the mesh network to mutually derive a pairwise temporal key from the pairwise master key. The authenticator device encrypts and signs a group temporal key using the pairwise temporal key for the particular device and sends the group temporal key encrypted and signed with the pairwise temporal key to the particular device.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: August 15, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Navindra Yadav, Atul Mahamuni, Jonathan Hui, Wei Hong, Alec Woo
  • Patent number: 9420514
    Abstract: A system and method adds and manages entries on a list of entries of routing information to allow the top entry to be used for routing to a destination corresponding to the list. Costs of a wireless link may be a function of the success rate experienced on that wireless link.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: August 16, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Jonathan W. Hui, Alec Woo, David E. Culler
  • Patent number: 9414293
    Abstract: A system and method adds and manages entries on a list of entries of routing information to allow the top entry to be used for routing to a destination corresponding to the list. Costs of a wireless link may be a function of the success rate experienced on that wireless link.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: August 9, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Jonathan W. Hui, Alec Woo, David E. Culler
  • Patent number: 9077638
    Abstract: A system and method changes a rate at which routing information is sent to increase it upon the detection of one or more events, maintaining the then current rate for an amount of time, or dropping it, otherwise.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: July 7, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Jonathan W. Hui, Alec Woo, David E. Culler
  • Publication number: 20150106625
    Abstract: According to one embodiment, techniques are provided to enable secure communication among devices in a mesh network using a group temporal key. An authenticator device associated with a mesh network stores a pairwise master key for each of a plurality of devices in a mesh network upon authentication of the respective devices. Using the pairwise master key, the authenticator device initiates a handshake procedure with a particular device in the mesh network to mutually derive a pairwise temporal key from the pairwise master key. The authenticator device encrypts and signs a group temporal key using the pairwise temporal key for the particular device and sends the group temporal key encrypted and signed with the pairwise temporal key to the particular device.
    Type: Application
    Filed: December 19, 2014
    Publication date: April 16, 2015
    Inventors: Navindra Yadav, Atul Mahamuni, Jonathan Hui, Wei Hong, Alec Woo
  • Patent number: 8990892
    Abstract: Techniques are provided for adaptive routing of authentication packets in a network, such as a wireless mesh network. At an authenticated device in the network, an authentication packet is received over the network from a device that is seeking authentication. The authentication packet is encapsulated for transmission in Layer 3 packets over an Internet Protocol (IP) tunnel to an authenticator device associated in the network. Similarly, for an authentication packet encapsulated in Layer 3 packets from the authenticator device over the IP tunnel, the authentication packet is decapsulated from the Layer 3 packets and transmitted over the network to the device seeking authentication.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: March 24, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Navindra Yadav, Atul Mahamuni, Jonathan Hui, Alec Woo
  • Patent number: 8959607
    Abstract: According to one embodiment, techniques are provided to enable secure communication among devices in a mesh network using a group temporal key. An authenticator device associated with a mesh network stores a pairwise master key for each of a plurality of devices in a mesh network upon authentication of the respective devices. Using the pairwise master key, the authenticator device initiates a handshake procedure with a particular device in the mesh network to mutually derive a pairwise temporal key from the pairwise master key. The authenticator device encrypts and signs a group temporal key using the pairwise temporal key for the particular device and sends the group temporal key encrypted and signed with the pairwise temporal key to the particular device.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: February 17, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Navindra Yadav, Atul Mahamuni, Jonathan Hui, Wei Hong, Alec Woo
  • Publication number: 20140321363
    Abstract: A system and method adds and manages entries on a list of entries of routing information to allow the top entry to be used for routing to a destination corresponding to the list. Costs of a wireless link may be a function of the success rate experienced on that wireless link.
    Type: Application
    Filed: July 7, 2014
    Publication date: October 30, 2014
    Inventors: Jonathan W. Hui, Alec Woo, David E. Culler
  • Patent number: 8867544
    Abstract: A system and method adds and manages entries on a list of entries of routing information to allow the top entry to be used for routing to a destination corresponding to the list. Costs of a wireless link may be a function of the success rate experienced on that wireless link.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: October 21, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Jonathan W. Hui, Alec Woo, David E. Culler
  • Patent number: 8806573
    Abstract: Techniques are provided for the controlled scheduling of the authentication of devices in a lossy network, such as a mesh network. An authenticator device that is configured to authenticate devices in a lossy network receives an authentication start message from a particular device to be authenticated. The authenticator device determines a schedule for engaging in an authentication procedure for the particular device based on an indication of current network utilization.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: August 12, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Atul Mahamuni, Navindra Yadav, Jonathan Hui, Alec Woo, Wei Hong
  • Patent number: 8798048
    Abstract: A system and method adds and manages entries on a list of entries of routing information to allow the top entry to be used for routing to a destination corresponding to the list. Costs of a wireless link may be a function of the success rate experienced on that wireless link.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: August 5, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Jonathan W. Hui, Alec Woo, David E. Culler
  • Publication number: 20140119200
    Abstract: A system and method adds and manages entries on a list of entries of routing information to allow the top entry to be used for routing to a destination corresponding to the list. Costs of a wireless link may be a function of the success rate experienced on that wireless link.
    Type: Application
    Filed: October 28, 2013
    Publication date: May 1, 2014
    Applicant: Cisco Technology, Inc.
    Inventors: Jonathan W. Hui, Alec Woo, David E. Culler
  • Publication number: 20140092749
    Abstract: A system and method changes a rate at which routing information is sent to increase it upon the detection of one or more events, maintaining the then current rate for an amount of time, or dropping it, otherwise.
    Type: Application
    Filed: December 9, 2013
    Publication date: April 3, 2014
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Jonathan W. Hui, Alec Woo, David E. Culler
  • Patent number: 8670325
    Abstract: A system and method changes a rate at which routing information is sent to increase it upon the detection of one or more events, maintaining the then current rate for an amount of time, or dropping it, otherwise.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: March 11, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Jonathan W Hui, Alec Woo, David E Culler
  • Patent number: 8571030
    Abstract: A system and method adds and manages entries on a list of entries of routing information to allow the top entry to be used for routing to a destination corresponding to the list. Costs of a wireless link may be a function of the success rate experienced on that wireless link.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: October 29, 2013
    Assignee: Cisco Technology, Inc.
    Inventors: Jonathan W Hui, Alec Woo, David E Culler
  • Patent number: 8554965
    Abstract: A system and method stores wirelessly received communications for wireless retransmission, making space in a storage device, if necessary, by deleting any one or more communications corresponding to the same group as the received communication. If storage in the storage device remains insufficient, communications that have been previously retransmitted by that same device are deleted, according to one or more characteristics of such stored communications, such as age or number of times an instance of that communication has been received. If storage in the storage device remains insufficient, communications of a different group are deleted according to one or more characteristics of the stored communications.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: October 8, 2013
    Assignee: Cisco Technology, Inc.
    Inventors: Alec Woo, David E. Culler
  • Publication number: 20130042301
    Abstract: Techniques are provided for the controlled scheduling of the authentication of devices in a lossy network, such as a mesh network. An authenticator device that is configured to authenticate devices in a lossy network receives an authentication start message from a particular device to be authenticated. The authenticator device determines a schedule for engaging in an authentication procedure for the particular device based on an indication of current network utilization.
    Type: Application
    Filed: August 9, 2011
    Publication date: February 14, 2013
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Atul Mahamuni, Navindra Yadav, Jonathan Hui, Alec Woo, Wei Hong
  • Publication number: 20130036305
    Abstract: According to one embodiment, techniques are provided to enable secure communication among devices in a mesh network using a group temporal key. An authenticator device associated with a mesh network stores a pairwise master key for each of a plurality of devices in a mesh network upon authentication of the respective devices. Using the pairwise master key, the authenticator device initiates a handshake procedure with a particular device in the mesh network to mutually derive a pairwise temporal key from the pairwise master key. The authenticator device encrypts and signs a group temporal key using the pairwise temporal key for the particular device and sends the group temporal key encrypted and signed with the pairwise temporal key to the particular device.
    Type: Application
    Filed: August 3, 2011
    Publication date: February 7, 2013
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Navindra Yadav, Atul Mahamuni, Jonathan Hui, Wei Hong, Alec Woo
  • Patent number: 8370693
    Abstract: A system and method communicates commands from a command originator to receiving devices, yet the receiving devices do not confirm receipt of the command. The most current command (e.g. the one with the highest sequence number) is rebroadcast by the command originator and the receiving devices, tending to be more frequent upon detection of an event indicating that the most current command was not received by at least one other device, and less frequently upon detection of an event indicating that the most current command was provided with sufficient duplication that if another device could receive it, the device likely did receive it, subject to a maximum and minimum rate.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: February 5, 2013
    Assignee: Cisco Technology, Inc.
    Inventors: Alec Woo, David E. Culler
  • Publication number: 20130014217
    Abstract: Techniques are provided for adaptive routing of authentication packets in a network, such as a wireless mesh network. At an authenticated device in the network, an authentication packet is received over the network from a device that is seeking authentication. The authentication packet is encapsulated for transmission in Layer 3 packets over an Internet Protocol (IP) tunnel to an authenticator device associated in the network. Similarly, for an authentication packet encapsulated in Layer 3 packets from the authenticator device over the IP tunnel, the authentication packet is decapsulated from the Layer 3 packets and transmitted over the network to the device seeking authentication.
    Type: Application
    Filed: July 6, 2011
    Publication date: January 10, 2013
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Navindra Yadav, Atul Mahamuni, Jonathan Hui, Alec Woo