John C Hovey

US Patent:

51012081, Mar 31, 1992

Filed:

Feb 24, 1967

Appl. No.:

4/619122

Inventors:

Carlyle V. Parker - Alexandria VA
John M. Hovey - Oxon Hill MD

International Classification:

G01S 1378

US Classification:

342 45

Abstract:

The device is an IFF Authentication System for sending and receiving of coded intelligence. So as to reduce an alien's chances of using the intelligence transmitted, the system uses a clock to provide signals for additional encipherment or scrambling of the coded intelligence. The clock is easily synchronized and provides continuously changing code encipherment for maximum protection and is connected into the system at a variety of predetermined places depending on the componential design of the particular system being used.

US Patent:

58189408, Oct 6, 1998

Filed:

Nov 22, 1972

Appl. No.:

5/308630

Inventors:

John M. Hovey - Washington DC
Carlyle V. Parker - Alexandria VA

Assignee:

The United States of America as represented by The Secretary of the Navy - Washington DC

International Classification:

H04L 906

US Classification:

380 50

Abstract:

A deciphering unit having input and output matrices connected to a master ift register to permit flexible access to its stages. The output matrix allows selection of four register positions in the master shift register from which data is fed to a correspondence generator where it is partially descrambled. Subsequently, the input matrix allows selection of four input register positions for the partially descrambled data, and one input register position for serial key shift register data. A comparison matrix selects eight bit positions to allow comparison of the descrambled master shift register data with a predetermined eight bit word. Upon favorable comparison a four bit word is transmitted to a base interrogating station for identification. Also, the same apparatus can be used for enciphering by shifting the data in the master shift register in a reverse manner.

US Patent:

39611698, Jun 1, 1976

Filed:

Mar 25, 1975

Appl. No.:

5/561967

Inventors:

Walton B. Bishop - Oxon Hill MD
John M. Hovey - Oxon Hill MD

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G06F 738

US Classification:

235152

Abstract:

A biased sequence of binary bits is produced such that the probability that any randomly selected bit will be a "1" is equal to a preselected desired number.