Patent ID: 8881274

Claim:
A method for providing data to a portable device via a network, comprising the steps of: maintaining a user information database; receiving data that includes encrypted content and a decryption module from a content providing server, the decryption module being for decrypting the encrypted content according to an encryption manner of the content providing server; re-encrypting at least a part of the received data into a format that the portable device can decrypt; transmitting the re-encrypted data to the portable device, wherein the portable device decrypts the encrypted content using the re-encrypted data, and plays the decrypted content; and receiving user authentication information for authenticating a user corresponding to the user authentication information with reference to the user information database from the portable device, wherein the re-encrypting comprises re-encrypting at least a part of the received data into the format that the portable device can decrypt, including the user authentication information for the portable device.