The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 1992
Filed:
Nov. 16, 1990
Applicant:
Inventors:
James N Esserman, San Diego, CA (US);
Jerrold A Heller, Del Mar, CA (US);
Assignee:
General Instrument Corporation, Hatboro, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ; H04L / ; H04N / ;
U.S. Cl.
CPC ...
380 20 ; 380-2 ; 380 10 ; 380 21 ; 380 28 ; 380 43 ; 380 49 ;
Abstract
A secure communication network serves a plurality of terminals grouped into different security categories. Each terminal includes a replaceable security element containing a security algorithm specific to the security category to which the terminal is assigned. Upon the breach of a particular security version, the security elements in the affected category are replaced with new elements containing a different algorithm. The security elements are relatively low cost, and can be replaced on an as needed or periodic basis to maintain system security.