Storage device and host device for protecting content and method thereof

摘要

A storage device for protecting content, includes a Secure Area (SA) area in which a decryption key needed to decrypt encrypted content is stored, and access to which is available to a host device that has passed authentication using a secure authentication protocol. The storage device stores a security information file for mapping control information for controlling usage of the encrypted content and the decryption key to the encrypted content.

主权项

1. A storage device for protecting content, comprising:
a memory device; and a controller that controls the memory device to store encrypted content, a control file for controlling usage of the encrypted content, a security information file including information on the control file, and a title key needed for decryption of the encrypted content, wherein the storage device is configured to send the security information file, the control file, the encrypted content and the title key to a host device, and the security information file includes an identifier indicating where the control file is stored in the storage device, wherein the security information file, the control file, and the encrypted content are stored and sent as separate files, and wherein the security information file further includes an initialization vector which is a value used in an encryption algorithm, the encrypted content is generated by encrypting content using the initialization vector, and the encrypted content is decrypted using the initialization vector.