John M Petro

US Patent:

6724893, Apr 20, 2004

Filed:

Oct 11, 1996

Appl. No.:

08/722385

Inventors:

John Petro - Columbia MD

Assignee:

The United States of America as represented by the National Security Agency - Washington DC

International Classification:

H04K 100

US Classification:

380 21, 380 23

Abstract:

A method of passing a cryptographic key that allows recovery of the key by a third party by generating a first random number by a first user; generating âkey â by the first user; generating a second random number âk â by the first user; computing ây â by the first user; computing ây â by the first user; computing âr â by the first user; computing âzâ by the first user; computing âsâ by the first user; computing âGâ by the first user; passing (G,z,r ,s) from the first user to the second user; receiving âYâ by the second user; computing âTâ by the second user; computing ây â by the second user; computing âk â by the second user; computing âkey â by the second user; intercepting, by a third party, (G,z,r ,s) transmitted from the first user to the second user; presenting âGâ and âz,â by the third party, to a key-escrow agent; computing ây â by the key-escrow agent; computing âkey â by the key-escrow agent, where key =key ; returning âkeyâ from the key-escrow agent to the third party if the third party is authorized to receive âkey â; and using âkey â by the authorized third party, to decrypt an encrypted message sent between the first user and the second user which was encrypted using âkey. â.

US Patent:

20180051177, Feb 22, 2018

Filed:

Jul 24, 2017

Appl. No.:

15/657473

Inventors:

- Washington DC, US
MARK M. HASEGAWA - Highland MD, US
SHARON A. STRAKA - Glenelg MD, US
JOHN C. PETRO - Greenbelt MD, US

International Classification:

C09D 1/00
C09D 163/00
C09D 5/16

Abstract:

A black molecular adsorber coating (MAC-B) composition is provided that exhibits adsorptive capabilities and reduces the effects of optical path degradation and system performance degradation when formed into a black coating having low reflectivity. The coating can be used in stray light control applications or within light paths between optical systems to absorb light and reduce the effects of optical path degradation. The coating can be used in vacuum systems to adsorb molecular contaminants and to reduce vacuum pressure levels. The coating composition can be sprayed onto interior surfaces, such as optical cavities of cameras, telescopes, lasers, baffles, detectors systems, and electronics boxes to control performance degradation due to outgassed molecular contaminants. The sprayable black molecular adsorber coating composition eliminates the major drawbacks of previous puck style adsorbers, slurry coated systems, and other bulky adsorber systems, resulting in cost savings, mass savings, easier utilization, greater adsorber surface area, more flexibility, and higher efficiency.

US Patent:

20150006913, Jan 1, 2015

Filed:

Jun 28, 2013

Appl. No.:

13/931585

Inventors:

- Columbia MD, US
John Petro - Columbia MD, US
Timothy Mark Millhollon - Ellicott City MD, US

International Classification:

G06F 21/60

US Classification:

713193

Abstract:

A system, apparatus, method, and/or computer program product is disclosed for decreasing side channel signal leakage and increasing speed of cryptographic combining operations. An exemplary method may be incorporated, in an exemplary embodiment, in an exemplary programmable logic device (PLD) such as, e.g., but not limited to, a field programmable gate array (FPGA) implementation of at least one cryptographic combining process, or may include an application specific integrated circuit (ASIC) design where cryptographic combining with minimal side channel signal leakage and high speed are provided.