| 摘要 |
Disclosed are a system and a method for performing re-authentication in a communication system. A user Authorization, Authentication and Accounting server transmits a user Master Session Key (MSK_U), which is generated by performing user re-authentication for a mobile station (MS) according to a twice Extensible Authentication Protocol scheme, to a device Authorization, Authentication and Accounting server that generates a new user Master Session Key (MSK_U 1 ) by using the MSK_U and a device Master Session Key generated at initial device authentication for the MS. A base station (BS) generates a Pairwise Master Key (PMK) by using the MSK_U 1, and the MS and BS generate an authorization key by using the PMK.
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