Lorenz W Redlefsen

US Patent:

20090138692, May 28, 2009

Filed:

Nov 5, 2008

Appl. No.:

12/291157

Inventors:

Kenneth J. Duda - Menlo Park CA, US
Hugh W. Holbrook - Palo Alto CA, US
Lorenz W. Redlefsen - Palo Alto CA, US

International Classification:

G06F 15/177

US Classification:

713 1

Abstract:

A network switch device includes a switch chassis, a supervisor mounted in the switch chassis; and a line card mounted in the chassis. The line card has independently addressable line card hardware components, and a line card memory storing a software-readable description of the line card hardware components. The supervisor controller reads the software-readable description of the line card hardware components from the line card, and creates software drivers for the line card hardware components from the software-readable description of the line card hardware components.

US Patent:

20170359182, Dec 14, 2017

Filed:

Mar 24, 2017

Appl. No.:

15/469437

Inventors:

- Santa Clara CA, US
Kenneth James Duda - Menlo Park CA, US
Lorenz Wolfgang Redlefsen - Austin TX, US

International Classification:

H04L 9/32
G06F 21/44
H04L 29/06

Abstract:

A method and apparatus of a network element that authenticates a field replaceable unit of the network element is described. The network element authenticates a field replaceable unit of the network element by generating a nonce. In addition, the network element generates a signature using a nonce and a private encryption key that is securely stored in the field replaceable unit. The network element further verifies the signature using a public encryption key that is a pair to the private encryption key and is not securely stored in the field replaceable unit. If the field replaceable unit is verified, the network element uses the field replaceable unit to operate the network element. Otherwise, the network element disables the field replaceable unit.

US Patent:

20150039894, Feb 5, 2015

Filed:

Jul 31, 2014

Appl. No.:

14/448873

Inventors:

Alexander Channing Ho - Menlo Park CA, US
Hugh W. Holbrook - Palo Alto CA, US
Lorenz Wolfgang Redlefsen - Austin TX, US

International Classification:

H04L 9/32
H04B 1/38

US Classification:

713176, 713168

Abstract:

A method and apparatus of a network element that authenticates a transceiver and/or a field replaceable unit of the network element is described. The network element generates a stored transceiver signature using transceiver data stored in the removable transceiver and a nonce. In addition, the network element generates a hardware transceiver signature using data stored in secure storage of the network element and the nonce. If the stored transceiver signature and the hardware transceiver signature are equal, the network element uses the transceiver to communicate network data for the network element. Otherwise, the network element disables the transceiver.

US Patent:

20150039895, Feb 5, 2015

Filed:

Jul 31, 2014

Appl. No.:

14/448883

Inventors:

Alexander Channing Ho - Menlo Park CA, US
Kenneth James Duda - Menlo Park CA, US
Lorenz Wolfgang Redlefsen - Austin TX, US

International Classification:

H04L 9/32
H04L 29/06

US Classification:

713176

Abstract:

A method and apparatus of a network element that authenticates a field replaceable unit of the network element is described. The network element authenticates a field replaceable unit of the network element by generating a nonce. In addition, the network element generates a signature using a nonce and a private encryption key that is securely stored in the field replaceable unit. The network element further verifies the signature using a public encryption key that is a pair to the private encryption key and is not securely stored in the field replaceable unit. If the field replaceable unit is verified, the network element uses the field replaceable unit to operate the network element. Otherwise, the network element disables the field replaceable unit.