Michael A Savage

US Patent:

7643817, Jan 5, 2010

Filed:

May 18, 2005

Appl. No.:

11/132643

Inventors:

Keith M. Klug - Mesa AZ, US
Stuart S. Kreitzer - Coral Springs FL, US
Brent M. McKay - Chandler AZ, US
Bradley J. Rainbolt - Sunrise FL, US
Fred R. Villa - Gilbert AZ, US
Marc A. Boillot - Plantation FL, US
Ty B. Lindteigen - Chandler AZ, US
Bernard R. McKibben - Gilbert AZ, US
Jerry D. Ray - Phoenix AZ, US
Michael A. Savage - Chandler AZ, US
Bryce Sutherland - Gilbert AZ, US
Barbara S. Winterfield - Mesa AZ, US

Assignee:

General Dynamics C4 Systems, Inc. - Scottsdale AZ
Motorola, Inc. - Schaumburg IL

International Classification:

H04M 1/66
H04K 1/00

US Classification:

455411, 455518, 455517

Abstract:

Techniques are provided for secure group communications in a wireless dispatch system which includes a group of devices. The group of devices can include a first secure device which communicates with a plurality of second secure devices over a channel.

US Patent:

7747021, Jun 29, 2010

Filed:

May 18, 2005

Appl. No.:

11/132707

Inventors:

Ty B. Lindteigen - Chandler AZ, US
Bernard R. McKibben - Louisville CO, US
Jerry D. Ray - Phoenix AZ, US
Michael A. Savage - Chandler AZ, US
Bryce Sutherland - Gilbert AZ, US
Barbara S. Winterfield - Mesa AZ, US
Keith M. Klug - Mesa AZ, US
Stuart S. Kreitzer - Coral Springs FL, US
Brent M. McKay - Chandler AZ, US
Bradley J. Rainbolt - Sunrise FL, US
Fred R. Villa - Gilbert AZ, US
Marc A. Boillot - Plantation FL, US

Assignee:

General Dynamics C4 Systems, Inc. - Scottsdale AZ
Motorola, Inc. - Schaumburg IL

International Classification:

H04L 9/00

US Classification:

380274, 380270

Abstract:

Methods and apparatus are provided for secure communication techniques in a communication system. The system can include a first device which communicates with a second device over a channel. A security association can be established during a first session between the devices via an asymmetric key exchange. The security association comprises a Traffic Encryption Key (TEK) and a first state vector. The TEK comprises a shared, secret symmetric key. The security association is stored in each of the devices for use during a second session between the devices to expedite security association establishment during call set-up of the second session. The security association can be associated with the second device in the first device, and with the first device in the second device. An updated state vector can be generated at the first device. A second session can be established between the first device and the second device by using the TEKs from the first session and the updated state vector.

US Patent:

49440080, Jul 24, 1990

Filed:

Feb 18, 1988

Appl. No.:

7/157002

Inventors:

Gerald V. Piosenka - Scottsdale AZ
William R. Worger - Mesa AZ
Michael A. Savage - Chandler AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H03K 102

US Classification:

380 46

Abstract:

A data locking system which modifies data in accordance with a renewable key variable derived from the exclusive ORing of a pseudorandom combination number from an external source means with an altered key variable.

US Patent:

55241344, Jun 4, 1996

Filed:

Apr 28, 1994

Appl. No.:

8/234793

Inventors:

David T. Gustafson - Gilbert AZ
Michael A. Savage - Chandler AZ
Paul R. Kennedy - Mesa AZ
Joseph Kish - Gilbert AZ
Bruce A. Fette - Mesa AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04M 1100

US Classification:

379 58

Abstract:

A security module for use in a cellular telephone provides for low power consumption. The security module includes a vocoder processor for manipulating signals from the telephone's microphone and to the telephone's ear piece; an encryption engine; a modem processor for controlling transmitted and received data from the cellular telephone; and a security system controller. The processors consume virtually no power when the phone is in the standby mode and very little power to produce encrypted communication when the cellular phone is operational.