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:
May. 05, 1992
Filed:
Aug. 17, 1990
James N Esserman, San Diego, CA (US);
Paul Moroney, Cardiff, CA (US);
General Instrument Corporation, Hatboro, PA (US);
Abstract
A field upgradeable security system deciphers signals received from a communication network. An information processor includes a receptacle for receiving a replaceable security element. The replaceable security element generates a working key necessary to the operation of the information processor. The working key is communicated to the information processor encrypted under a secret key. The information processor decrypts the encrypted working key for use in deciphering a received communication signal. Additional layers of encryption can be added to the communications between the information processor and security element to increase the level of security.