Abstract: A method and system for erasing data stored in a storage medium of a computer system is disclosed. According to one embodiment, a booting parameter of an operating system of the computer system is changed to a data erasure program. After the computer system is rebooted, the data erasure program is launched, and a disk drive of the computer system is erased by overwriting with a pattern of data. The data erasure program runs in a native mode of the operating system prior to executing a file system check routine of the operating system.

Abstract: A method and system for erasing data stored in a storage medium of a computer system is disclosed. According to one embodiment, a booting parameter of an operating system of the computer system is changed to a data erasure program. After the computer system is rebooted, the data erasure program is launched, and a disk drive of the computer system is erased by overwriting with a pattern of data. The data erasure program runs in a native mode of the operating system prior to executing a file system check routine of the operating system.

Abstract: A method and system for synchronizing an encrypted file with a remote storage is disclosed. According to one embodiment, a computer-implemented method comprises providing a user with a user application and an encryption key in a portable memory device. The user runs the user application to securely access to a storage on a cloud storage system. A file is encrypted with the encryption key stored in the portable memory device and synchronized with the cloud storage system.

Abstract: A method and system for synchronizing an encrypted file with a remote storage is disclosed. According to one embodiment, a computer-implemented method comprises providing a user with a user application and an encryption key in a portable memory device. The user runs the user application to securely access to a storage on a cloud storage system. A file is encrypted with the encryption key stored in the portable memory device and synchronized with the cloud storage system.

Abstract: A method and system for providing secure access to a remote file is disclosed. According to one embodiment, a portable memory device containing a secure desktop is provided to a user. The user has a user device that removably accepts the portable memory device. The user is allowed to securely access a dedicated storage of the cloud storage system that is created at a request from an administrator. The secure desktop runs independently from a user desktop of the user device. The user's access to a local storage of the user device is blocked while the secure desktop is running.

Abstract: A method and system for providing secure access to a remote file is disclosed. According to one embodiment, a portable memory device containing a secure desktop is provided to a user. The user has a user device that removably accepts the portable memory device. The user is allowed to securely access a dedicated storage of the cloud storage system that is created at a request from an administrator. The secure desktop runs independently from a user desktop of the user device. The user's access to a local storage of the user device is blocked while the secure desktop is running.

Abstract: Provided is an orthogonal frequency division multiplexing (OFDM) apparatus using a 3-dimensional (3D) signal constellation. The apparatus performs 2D inverse fast Fourier transform on a set of 3D subchannel signals that is mapped by a signal constellation including signal points distributed on the surface of a 3D sphere.

Abstract: Provided is an orthogonal frequency division multiplexing (OFDM) apparatus using a 3-dimensional (3D) signal constellation. The apparatus performs 2D inverse fast Fourier transform on a set of 3D subchannel signals that is mapped by a signal constellation including signal points distributed on the surface of a 3D sphere.