Ronald Victor Chandos

US Patent:

53897382, Feb 14, 1995

Filed:

May 4, 1992

Appl. No.:

7/878271

Inventors:

Gerald V. Piosenka - Scottsdale AZ
David M. Harrison - Mesa AZ
Ronald V. Chandos - Tempe AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01L 2302
H01L 2328
G08B 1900
H04L 900

US Classification:

174 524

Abstract:

A tamperproof arrangement for an integrated circuit device. The arrangement includes a package and lid fabricated of heavy metals to prevent X-radiation or infrared detection of circuit operation. Sensors and control circuitry are located on the integrated circuit die itself which detect increased temperature and radiation and clear or zeroize any sensitive information included within the integrated circuit device. Electrode finger grids above and below the integrated circuit die detect physical attempts to penetrate the integrated circuit die. Critical circuit functions are segregated from non-critical functions. Power applied to the integrated circuit device is monitored and separated for critical and non-critical circuit functions.

US Patent:

49930680, Feb 12, 1991

Filed:

Nov 27, 1989

Appl. No.:

7/441573

Inventors:

Gerald V. Piosenka - Scottsdale AZ
Ronald V. Chandos - Tempe AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04K 100

US Classification:

380 23

Abstract:

An unforgeable personal identification system for identifying users at remote access control sites. The unforgeable personal identification system generates one-way encrypted versions of physically immutable identification credentials (facial photo, retinal scan, voice and finger prints). These credentials are stored on a portable memory device (credit card size). At a remote access control site, the user presents his portable memory device and the encrypted identification credentials are read. The user then submits physically to inputting of his physical identification characteristics to the remote access control site. Comparison is performed with the credentials obtained from the memory device and with the user's physical identity to determine whether to allow or deny access at the remote site.

US Patent:

54066301, Apr 11, 1995

Filed:

Jan 10, 1994

Appl. No.:

8/160598

Inventors:

Gerald V. Piosenka - Scottsdale AZ
David M. Harrison - Mesa AZ
Ronald V. Chandos - Tempe AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04L 900

US Classification:

380 52

Abstract:

A tamperproof arrangement for an integrated circuit device. The arrangement includes a package and lid fabricated of heavy metals to prevent X-radiation or infrared detection of circuit operation. Sensors and control circuitry are located on the integrated circuit die itself which detect increased temperature and radiation and clear or zeroize any sensitive information included within the integrated circuit device. Electrode finger grids above and below the integrated circuit die detect physical attempts to penetrate the integrated circuit die. Critical circuit functions are segregated from non-critical functions. Power applied to the integrated circuit device is monitored and separated for critical and non-critical circuit functions.

US Patent:

62400746, May 29, 2001

Filed:

Feb 19, 1998

Appl. No.:

9/025808

Inventors:

Ronald V. Chandos - Tempe AZ
William R. Worger - Gilbert AZ
David M. Harrison - Mesa AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 7204
H04J 308
H04J 304
H04Q 720

US Classification:

370321

Abstract:

A secure communication hub (10) relays local communications between low probability of intercept (LPI) user radio equipment (68) and provides a secure interface with a command center (58) through a non-geostationary commercial satellite communication system. The secure communication hub (10) includes different radio interface units (12) for communicating different data formats with the (LPI) user radio equipment (68). Encryption and decryption circuitry (18) provides for different security levels and different keys for the (LPI) user radio equipment. Links with the satellite system are secured using encryption.

US Patent:

56152140, Mar 25, 1997

Filed:

Oct 30, 1995

Appl. No.:

8/550318

Inventors:

Ronald V. Chandos - Tempe AZ
Brent M. McKay - Chandler AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04J 314

US Classification:

370349

Abstract:

In a packetized communication system, packets are dispatched to a receiving node (10) for reassembly and presentation to a user. Packets propagating over dynamic paths have propagation variations between subsequent packets. Interactive packetized voice communication systems mandate that end-to-end delays be minimized. This results in voice gaps between an on-time synthesized voice data (602"') and a subsequent delayed synthesized voice data (603"'). Voice gaps are temporarily patched with voice prediction samples and end-to-end timing is adjusted to minimized prediction samples. When packets are lost in the network, prediction packets are substituted and annunciated to a user until valid packets are received.

US Patent:

55880592, Dec 24, 1996

Filed:

Mar 2, 1995

Appl. No.:

8/398181

Inventors:

Ronald V. Chandos - Tempe AZ
Robert I. Foster - Mesa AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04L 900
H04L 908

US Classification:

380 21

Abstract:

A computer system includes a Key Certification Agency (KCA) (12), a host computer (16), and a number of remote terminals (14). The KCA (12) uses incompatible encryption processes (96, 98) to encrypt session control data and to store the data as various messages (44, 46, 48) in a user token (26). The token (26) may be removably installed in any remote terminal (14). To set up a communication session, the token uncovers one of the messages (48) using a crypto-uncovering agent which is known to the user. This message includes a remote traffic key after deciphering, but the key is never transmitted to the host. The host (16) deciphers the other messages (44, 46) and constructs a host traffic key in response to data contained therein. No plain text is transmitted during the setup or the session.

US Patent:

55618383, Oct 1, 1996

Filed:

Jul 1, 1994

Appl. No.:

8/270969

Inventors:

Ronald V. Chandos - Tempe AZ
Daniel R. Tayloe - Phoenix AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 7185

US Classification:

455 131

Abstract:

A satellite cellular communications network performs cell-to-cell handoffs between cells of different satellites (30, 32). Inter-satellite handoffs require resynchronization to the prospective propagation timing and Doppler frequency parameters of the prospective satellite. Calculation of these parameters prior to transitioning to the prospective satellite minimizes interruptions to communications. Subscriber units (24) perform handoff parameter calculations while on narrow band communications channels without occupying broadband shared acquisition resources.

US Patent:

45876258, May 6, 1986

Filed:

Jul 5, 1983

Appl. No.:

6/510717

Inventors:

Joseph T. Marino - Chandler AZ
Ronald V. Chandos - Tempe AZ

Assignee:

Motorola Inc. - Schaumburg IL

International Classification:

G06F 1516
G06F 1560

US Classification:

364578

Abstract:

A hardware simulator for simulating digital structures includes a general purpose computer and an improved simulator processor. The improved processor handles an advanced primitive having four inputs and one output and which is capable of representing a memory cell or similar structure. The architecture of the processor provides highly efficient compilation of the input states of a primitive and the primitive evaluator and resolver logic provide the output state in a minimum number of clock cycles. The simulator is a single, low cost unit capable of simulating 64K cell structures with a speed comparable to prior art simulators.