APPARATUS AND METHOD FOR DETECTING DUPLICATION OF PORTABLE SUBSCRIBER STATION IN PORTABLE INTERNET SYSTEM
First Claim
1. A method for detecting duplication of a portable subscriber station (PSS) in a portable Internet system including an authentication authorization and accounting (AAA) server which performs authentication for the PSS and a radio access station (RAS) wirelessly connecting the PSS and the AAA server, the method comprising the steps of:
- (a) performing a first authentication, at the AAA server, using a master key of a connected PSS;
(b) updating the master key of the connected PSS when the first authentication is successfully performed, and performing a second authentication using inherent information provided to an original PSS when the first authentication fails; and
(c) checking a duplication possibility bit value when the second authentication is successfully performed, authenticating the connected PSS as legitimate when there is no duplication possibility bit value and updating the master key of the connected PSS after assigning a duplication possibility bit value, and determining the connected PSS as duplicated when there is a duplication possibility bit value or the second authentication fails.
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Accused Products
Abstract
An apparatus and method for detecting duplication of a portable subscriber station (PSS) in a portable Internet system are provided. A master key of a PSS and a master key of an AAA server are identically updated whenever the PSS succeeds in authentication. It is possible to determine whether the PSS is duplicated or not by comparing the master key of the PSS with the master key of the AAA server during an authentication procedure. In addition, it is possible to find out whether duplication for the corresponding PSS is made by a user'"'"'s own volition or by a third party by additionally performing an authentication procedure which requires an input of a password for a PSS which is doubted as duplicated.
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Citations
26 Claims
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1. A method for detecting duplication of a portable subscriber station (PSS) in a portable Internet system including an authentication authorization and accounting (AAA) server which performs authentication for the PSS and a radio access station (RAS) wirelessly connecting the PSS and the AAA server, the method comprising the steps of:
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(a) performing a first authentication, at the AAA server, using a master key of a connected PSS; (b) updating the master key of the connected PSS when the first authentication is successfully performed, and performing a second authentication using inherent information provided to an original PSS when the first authentication fails; and (c) checking a duplication possibility bit value when the second authentication is successfully performed, authenticating the connected PSS as legitimate when there is no duplication possibility bit value and updating the master key of the connected PSS after assigning a duplication possibility bit value, and determining the connected PSS as duplicated when there is a duplication possibility bit value or the second authentication fails. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for detecting duplication of a portable subscriber station (PSS) in a portable Internet system including an AAA server which performs authentication, the PSS including an original PSS and a duplicated PSS which store information including a MAC address, a master key, and a call count of the original PSS, the method comprising the steps of:
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(a) performing a first authentication, at the AAA server, using a master key of a connected PSS; (b) updating the master key of the connected PSS and allowing access of the connected PSS to a network when the first authentication is successfully performed, and performing a second authentication using inherent information provided to an original PSS when the first authentication fails; and (c) updating the master key of the connected PSS and allowing access of the connected PSS to the network when the second authentication is successfully performed, and determining the connected PSS as duplicated and rejecting access of the connected PSS to the network when the second authentication fails. - View Dependent Claims (13)
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14. An apparatus for detecting duplication of a portable subscriber station (PSS) in a portable Internet system, comprising:
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a memory including an authentication table for storing a master key and a duplication possibility bit value for each PSS; a PSS duplication determining means for comparing the master key of the PSS connected through a radio access station (RAS) with the master key stored in the authentication table to determine whether the connected PSS is an original PSS or not, and determining whether the connected PSS is duplicated or not using the duplication possibility bit value stored in the authentication table; a master key updating means for identically updating the master key of the connected PSS and the master key of the authentication table when the connected PSS is determined to be legitimate; and an authentication controller for performing the whole operation related to authentication and duplication determination for the connected PSS. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification