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. 21, 2002
Filed:
Mar. 02, 1998
Dean H. Vogler, Algonquin, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
Encryption keys are transferred by obtaining a public and private key pair ( ) from a source device ( ). The public key is transmitted ( ) from the source device ( ) to a target device ( ). The target ( ) obtains a traffic key ( ) stored within the target device ( ). The traffic key is encrypted ( ) within the target device using the public key. The encrypted traffic key is transmitted to the source device ( ) where it is decrypted ( ) using the private key. The replacement encryption key(s) is(are) encrypted using the traffic key by the source device ( ) forming an encrypted replacement key message which contains a target slot identification for each of the replacement encryption keys. The encrypted replacement key message is transmitted to the target device ( ) where the replacement encryption key(s) is(are) recovered ( ). The replacement encryption key(s) is(are) then stored at the target device in an identified target slot ( ). The public, private, and traffic keys may then be erased from the source and target devices as appropriate.