Richard Lewis Murray

US Patent:

D3648770, Dec 5, 1995

Filed:

Mar 21, 1994

Appl. No.:

D/020189

Inventors:

Masaru Tokiyama - Coral Springs FL
Richard E. Murray - Coral Springs FL
William C. Phelps - Lawrenceville GA

Assignee:

Motorola, Inc. - Schaumburg IL

US Classification:

D14258

US Patent:

D3816591, Jul 29, 1997

Filed:

Feb 3, 1995

Appl. No.:

D/034376

Inventors:

Masaru Tokiyama - Coral Springs FL
William H. Robertson - Plantation FL
Richard E. Murray - Arlington TX

Assignee:

Motorola, Inc - Schaumburg IL

International Classification:

1403

US Classification:

D14194

US Patent:

52221377, Jun 22, 1993

Filed:

Apr 3, 1991

Appl. No.:

7/680188

Inventors:

Steven T. Barrett - Plantation FL
Kevin M. Laird - Haltom City TX
Richard E. Murray - Coral Springs FL
James M. O'Connor - N. Richland Hills TX

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04L 902

US Classification:

380 21

Abstract:

A radio (100) transmits and receives encrypted signals having unencrypted key identifiers, allowing other radios having the corresponding key identifiers and encryption keys to communicate with radio (100). Prior to transmitting an encrypted message, radio (100) selects a unique key identifier automatically and uses the corresponding encryption key to encrypt the message that will be transmitted. Radio (100) transmits the key identifier in an unencrypted format with the encrypted message in order to allow other radios to determine the encryption key used in encrypting the message. When receiving an encrypted message, radio (100) uses the predetermined process stored in the radio (100) to properly select the proper encryption key for use in decrypting the incoming message.

US Patent:

51857979, Feb 9, 1993

Filed:

Mar 27, 1991

Appl. No.:

7/676019

Inventors:

Steven T. Barrett - Plantation FL
Kevin M. Laird - Haltom City TX
Richard E. Murray - Coral Springs FL
James M. O'Connor - N. Richland Hills TX

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04L 902
H04K 100
H04K 900

US Classification:

380 21

Abstract:

A trunked communication system (400) transmits and receives encrypted signals over the system control channel (402). The trunked system (b 400) includes a plurality of radios (300) which can communicate with the communication system via control channel (402). By using control information signals and system information signals radios (300) can determine if it they are capable of decrypting the encrypted control information signals sent over the control channel (402). This is done by first determining if the encryption identification field found in the unencrypted system information signal matches an encryption identification field found in radio (300). If a match is found between the radio's encryption identification and the encryption identification field in the system identification signal radio (300) loads the encryption into the encryption circuitry in order to successfully decrypt the control information signals.

Address:

575 NW 13 Ave, Boca Raton, FL 33486

VIN:

5GZER13757J101869

Make:

SATURN

Model:

OUTLOOK

Year:

2007