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:
Jan. 31, 2023
Filed:
Jul. 07, 2014
Nec Corporation, Tokyo, JP;
Xiaowei Zhang, Tokyo, JP;
Anand Raghawa Prasad, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
In order to improve security upon distributing a group key, there is provided a gateway () to a core network for a group of MTC devices (_-_) communicating with the core network. The gateway () protects confidentiality and integrity of a group key, and distributes the protected group key to each of the MTC devices (_-_). The protection is performed by using: a key (Kgr) that is preliminarily shared between the gateway () and each of the MTC devices (_-_), and that is used for the gateway () to authenticate each of the MTC devices (_-_) as a member of the group; or a key (K_iwf) that is shared between an MTC-IWF () and each of the MTC devices (_-_), and that is used to derive temporary keys for securely conducting individual communication between the MTC-IWF () and each of the MTC devices (_-_).