Abstract: A virtual environment system and a method of operating the same, the virtual environment system including: a virtual operating system (OS) unit to operate a virtual OS installed in a mobile storage medium in a host OS installed in a host computer, to attach a virtual resource included in the virtual OS to the host OS, and to perform arbitration so that a virtual process operated in the virtual OS uses the virtual resource; and a user interface unit to provide a virtual desktop screen so that a user can use the virtual process in the virtual environment provided by the virtual OS.

Abstract: A method of mutually authenticating between a local host and a software mobility device including an operating system virtualization layer, and a method of forming an input/output (I/O) channel. The method of authenticating a local host in the software mobility device includes requesting a certificate from the local host in which an integrity value of the local host is stored, and receiving the certificate from the local host; receiving an integrity value measured in the local host and comparing the measured integrity value with the integrity value included in the certificate to verify the local host; and when the local host is verified, encrypting a security profile of the software mobility device and transmitting the encrypted security profile to the local host so as to provide secure communication between the local host and the software mobility device.

Abstract: A method of authenticating a content provider and assuring content integrity by which the content provider is authenticated and the content integrity is assured upon download, exchange or transfer of a variety of multimedia contents through a wired/wireless communication network. The method of authenticating the content provider and assuring the content integrity, including downloading packaged contents with an electronic signature made thereto into a device of a user through a wired/wireless communication network, finding a URL address from which a certificate for verification of a signature of the content provider is provided, in a header of the contents, acquiring the certificate of the content provider after moving to the URL address, extracting a public key required for the verification of the electronic signature from the acquired certificate, and verifying the electronic signature by using the extracted public key.

Abstract: Disclosed is a method for determining a wireless communication system by selecting a wireless communication system without considering a corresponding service area. The method includes the steps of: a) if there are any available wireless communication system having identical system type, selecting a wireless communication system having highest priority in the PRL by searching wireless communication system in the first service area and a plurality of second service areas neighbored to the first service area and comparing priories of wireless communication systems in the first service area and second service areas; and d) if there are not any available wireless communication system having identical system type, selecting a wireless communication system having highest priority in the PRL by searching wireless communication system in a plurality of second service areas neighbored to the first service area.

Abstract: A wireless communication terminal controlling an input detecting operation by using an interrupt handler is disclosed. The wireless communication terminal includes: a general purpose input output (GPIO) port for receiving an input, changing a state of the GPIO port according to the input and transmitting a signal when the input is received; a first timer for providing a first predetermined interval; a second timer for providing a second predetermined interval; a controlling unit for activating the interrupt handler to receive the signal from the GPIO port and generate an interrupt by receiving the signal for activating the first timer and the second timer, un-activating the interrupt handler when the interrupt handler generates the interrupt, performing the input detecting operation based on the first predetermined interval, re-activating the interrupt handler based on the second predetermined interval for stopping to perform the input detecting operation.

Abstract: A method is provided for granting a digital rights management license between a server and a plurality of devices. Content is transmitted from the server to at least one of the plurality of devices, wherein the content contains license information that includes identifiers for at least two of the plurality of devices capable of reproducing the content respectively. The identifiers included in the license information are extracted from the received content, and if the extracted identifier corresponds to an own identifier of the device, the content is reproduced by the device.

Abstract: Provided is a method for delivering all or part of a rights object (RO) of a user associated with the content to other users. The method includes creating a rights object to be transmitted to a second user within a limit of the rights object held by the first user, and forwarding the created rights object to the second user. The method allows each user to share its own RO with other users within the limit of the RO without server authentication.

Abstract: A method of authenticating a content provider and assuring content integrity by which the content provider is authenticated and the content integrity is assured upon download, exchange or transfer of a variety of multimedia contents through a wired/wireless communication network. The method of authenticating the content provider and assuring the content integrity, including downloading packaged contents with an electronic signature made thereto into a device of a user through a wired/wireless communication network, finding a URL address from which a certificate for verification of a signature of the content provider is provided, in a header of the contents, acquiring the certificate of the content provider after moving to the URL address, extracting a public key required for the verification of the electronic signature from the acquired certificate, and verifying the electronic signature by using the extracted public key.

Abstract: Disclosed is a method for determining a wireless communication system by selecting a wireless communication system without considering a corresponding service area. The method includes the steps of: a) if there are any available wireless communication system having identical system type, selecting a wireless communication system having highest priority in the PRL by searching wireless communication system in the first service area and a plurality of second service areas neighbored to the first service area and comparing priories of wireless communication systems in the first service area and second service areas; and d) if there are not any available wireless communication system having identical system type, selecting a wireless communication system having highest priority in the PRL by searching wireless communication system in a plurality of second service areas neighbored to the first service area.

Abstract: A system and method for managing non-free multimedia contents in an intranet. The system includes proxy managers provided in a server of the intranet, for example, a media center or set-top box, and clients, for example, DRM smart clients in wired/wireless digital information appliances, such as Digital TVs or PDAs. Various kinds of encrypted multimedia contents and license information are converted by the proxy managers into multimedia contents and license information having a format executable by the DRM smart clients.

Abstract: Disclosed herein is a method and system for registering and verifying a smart card certificate for users moving between public key infrastructure domains, which allows a user moving between domains to have a smart card certified in a terminal located in an external domain other than a home domain. According to the present invention, when a user wants his/her own smart card to be certified in a terminal of an external domain, a certification authority of the external domain can certify the smart card using a certificate stored in the smart card and signed electronically by a certification authority of a home domain. Additionally, a new certificate issued by the certification authority of the external domain is stored in the certified smart card, so that a certificate of the moving user can be verified regardless of domains and a new certificate of a moved domain can be easily obtained.