Instrumentation privacy methods and apparatuses

Details Instrumentation privacy methods and apparatuses Instrumentation privacy methods and apparatuses

2002-11-26

2008-09-16

Parthasarathy, Pramila (Department: 2136)

Cryptography

Communication system using cryptography

Data stream/substitution enciphering

Reexamination Certificate

active

07426272

ABSTRACT:
The present invention provides methods and apparatuses for implementing communications privacy on a class of two-way wireless control communications. The methods and apparatuses of the present invention are cryptographic in nature and are built on a symmetric cryptographic algorithm structure. The cryptographic algorithm structure generates keytext on a frame-by-frame basis and both directions of the communications control link are served by the same keytext frames. The methods and apparatuses of the present invention utilize a single outbound/inbound cryptographic generator, such as a shrinking generator or the like designed using six-sigma tools in order to ensure, within a predetermined probability, that the non-fixed encryption time does not cause operational problems.

REFERENCES:
patent: 5727064 (1998-03-01), Reeds, III
patent: 5995623 (1999-11-01), Kawano et al.
patent: 6707914 (2004-03-01), Bell
patent: 6944299 (2005-09-01), Mallela et al.
patent: WO 00/46954 (2000-08-01), None

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