Abstract: Provided are a method and a system for authenticating a radio frequency identification (RFID) tag, by which an RFID reader and an authentication server authenticate the RFID tag by using a cryptographic operation and a protocol.

Abstract: A key descriptor structure exchanged between a wireless LAN terminal and an access point, and a method and apparatus for cryptographing wireless data are provided. The key descriptor structure includes a key initial vector which is a random number generated in the access point, a key descriptor type which indicates an encryption algorithm, and a plurality of key materials encrypted according to the encryption algorithm of the key descriptor using the key initial vector and a master session key shared between the wireless LAN terminal and the access point as an encryption key.

Abstract: An apparatus for dynamically managing a group transient key (GTK) and a method thereof in order to perform setting of a GTK successfully by an access point (AP). Wherein, the AP checks security state of a plurality of mobile stations (MS)s connecting to the AP, and exchanges and sets a GTK for authenticated MSs. The apparatus for managing a GTK in a wireless LAN system, the apparatus including: a GTK generation timing deciding unit for deciding timing to generate a GTK based on security state of an MS; a GTK generating unit for generating a GTK according to the GTK generation timing decided in the GTK generation timing deciding unit; a GTK exchanging unit for exchanging the GTK generated in the GTK generating unit based on the security state of the MS; and a GTK setting unit for setting the GTK based on the number of MSs exchanged the GTK.

Abstract: An apparatus for dynamically managing a group transient key (GTK) and a method thereof in order to perform setting of a GTK successfully by an access point (AP). Wherein, the AP checks security state of a plurality of mobile stations (MS)s connecting to the AP, and exchanges and sets a GTK for authenticated MSs. The apparatus for managing a GTK in a wireless LAN system, the apparatus including: a GTK generation timing deciding unit for deciding timing to generate a GTK based on security state of an MS; a GTK generating unit for generating a GTK according to the GTK generation timing decided in the GTK generation timing deciding unit; a GTK exchanging unit for exchanging the GTK generated in the GTK generating unit based on the security state of the MS; and a GTK setting unit for setting the GTK based on the number of MSs exchanged the GTK.

Abstract: A key descriptor structure exchanged between a wireless LAN terminal and an access point, and a method and apparatus for cryptographing wireless data are provided. The key descriptor structure includes a key initial vector which is a random number generated in the access point, a key descriptor type which indicates an encryption algorithm, and a plurality of key materials encrypted according to the encryption algorithm of the key descriptor using the key initial vector and a master session key shared between the wireless LAN terminal and the access point as an encryption key.

Abstract: A method of setting a communication environment between a mobile terminal and a smart card using a layered architecture of a protocol stack is disclosed. The mobile terminal and the smart card are provided with a plurality of applications and a plurality of applications, respectively, and also provided with a transmission layer for receiving and transferring the data and an application layer for processing the data. The answer-to-reset signal which is a response of the smart card comprises an information on the communication environment supported by the smart card, as well as an information contained in the typical answer-to-reset. Therefore, in case of setting the communication environment between the smart card and the mobile terminal, the communication environment very suitable for the relevant application can be dynamically established, so that a stable communication channel can be promptly provided to a user of the mobile terminal employing the smart card.