Cryptography – Communication system using cryptography – Wireless communication
Reexamination Certificate
2011-07-12
2011-07-12
Dinh, Minh (Department: 2432)
Cryptography
Communication system using cryptography
Wireless communication
C380S273000, C380S277000, C380S283000, C380S044000, C713S171000
Reexamination Certificate
active
07978855
ABSTRACT:
The present invention relates to a method for allocating an authorization key identifier in a wireless portable Internet system. In a privacy key management version 2 (PKMv2) of the wireless portable Internet system, a base station generates PAK identifier, PMK identifier, and authorization key identifier for distinguishing a primary authorization key (PAK) shared by the base station and the subscriber station in an RSA-based authorization, a pairwise master key (PMK) shared by the base station and the subscriber station in an EAP-based authorization, and authorization keys generated by the PAK and the PMK. The base station transmits PAK identifier, PMK identifier, and authorization key identifier to the subscriber station and shares them with the subscriber station. Therefore, the base station and the subscriber station may easily distinguish more than 2 authorization-related keys. In addition, it is possible to transmit the signal message efficiently in the radio channel by reducing the sizes of the PAK identifier, PMK identifier, and authorization key identifier.
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Chang Sung-Cheol
Cho Seok-Heon
Yoon Chul-Sik
Dinh Minh
Electronics and Telecommunications Research Institute
Hanaro Telecom, Inc.
Jefferson IP Law, LLP
KT Corporation
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