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:
Oct. 03, 2017
Filed:
Feb. 14, 2012
Silke Holtmanns, Klaukkala, FI;
Nadarajah Asokan, Espoo, FI;
Silke Holtmanns, Klaukkala, FI;
Nadarajah Asokan, Espoo, FI;
Nokia Technologies Oy, Espoo, FI;
Abstract
A method, apparatus and computer program product are disclosed for establishing secure off-network communications between first and second Secure Cellular Devices that each have a cellular identity. The second Secure Cellular Device may assume the role of Remote Device for interaction with the NAF keyserver and may obtain a local key. The first Secure Cellular Device may derive the local key and the two devices may conduct secure communications using the shared local key. The two Secure Cellular Devices may alternate the roles of Secure Host and Remote Device, each twice obtaining or deriving a shared local key such that there are two such keys. The devices may employ one key for secure communication in one direction and the other for communication in the other direction. Alternatively, the devices may derive a unique shared key as a function of the two shared keys.