Computer system for playing encrypted multimedia data and method for the same

1 . A computer system for playing encrypted multimedia data, comprising:

a first operating system (OS) that consumes system resources heavily;

a register information stored in the first operating system to provide a decrypting information for at least one kind of the encrypted multimedia data; and

a second operating system that consumes the system resources slightly;

wherein the register information stored in the first operating system is available to the second operating system.

2 . The computer system as claimed in claim 1 , wherein the decrypting information is a decrypting key corresponding to the at least one kind of the encrypted multimedia data.

3 . The computer system as claimed in claim 1 , wherein the register information is a register code corresponding to an application program to make the application program executable.

4 . The computer system as claimed in claim 1 , wherein the register information is a cookie information having a recognition information that is transmitted from a remote website server to the computer system.

5 . A computer system for playing encrypted multimedia data, the computer system having a first operating system that heavily consumes system resources and a second operating system that slightly consumes the system resources, the computer system running the second operating system for encrypting the encrypted multimedia data, the computer system comprising:

a register code stored in the first operating system to provide a decrypting information for at least one kind of the encrypted multimedia data;

a decrypting unit that cooperates with the second operating system to access the decrypting information and the at least one kind of the encrypted multimedia data to perform a decrypting operation; and

a playback unit that cooperates with the second operating system to access the at least one kind of the encrypted multimedia data decrypted by the decrypting unit to perform a playback operation.

6 . The computer system as claimed in claim 5 , wherein the decrypting information is a decrypting key corresponding to the at least one kind of the encrypted multimedia data, and the decrypting unit uses the decrypting key to decrypt the at least one kind of the encrypted multimedia data.

7 . The computer system as claimed in claim 5 , wherein the decrypting information is the register code corresponding to an application program to make the application program executable.

8 . The computer system as claimed in claim 5 , wherein the decrypting information is a cookie information having a recognition information that is transmitted from a remote website server to the computer system.

9 . The computer system as claimed in claim 5 , further comprising a storage unit to provide at least one kind of local multimedia data, wherein the at least one kind of local multimedia data is transmitted directly to the playback unit if the at least one kind of local multimedia data has not been encrypted.

10 . The computer system as claimed in claim 9 , further comprising a multimedia receiving unit that is used to receive at least one kind of remote multimedia data and store the at least one kind of remote multimedia data to the storage unit.

11 . The computer system as claimed in claim 10 , wherein the multimedia receiving unit is capable of converting the remote multimedia data that is analog to digital multimedia data.

12 . The computer system as claimed in claim 5 , further comprising an input unit to provide an external command.

13 . The computer system as claimed in claim 12 , wherein the input unit is a wireless remote controller.

14 . The computer system as claimed in claim 12 , further comprising a central processing unit (CPU) to receive the external command from the input unit to drive a multimedia receiving unit to receive at least one kind of remote multimedia data.

15 . The computer system as claimed in claim 5 , wherein the second operating system shares application programs installed in the first operating system via an interface unit.

16 . A method for playing encrypted multimedia data, the method being used for a computer system having a first operating system that heavily consumes system resources and a second operating system that slightly consumes the system resources, the computer system running the second operating system for encrypting the encrypted multimedia data, the method comprising:

storing a register information in the first operating system to an encrypting information corresponding to at least one kind of the encrypted multimedia data;

using an encrypting unit that cooperates with the second operating system to access the register information and the at least one kind of the encrypted multimedia data to perform a decrypting operation; and

using a playback unit that cooperates with the second operating system to access the at least one kind of the encrypted multimedia data that has been decrypted to perform a playback operation.

17 . The method as claimed in claim 16 , further comprising:

storing at least one kind of multimedia data to a storage unit; wherein the at least one kind of multimedia data is transmitted directly to the playback unit if the at least one kind of multimedia data has not been encrypted and then the playback unit performs a playback operation.

18 . The method as claimed in claim 17 , further comprising:

using an input unit to provide an external command to drive a multimedia receiving unit to receive at least one kind of remote multimedia data and store the at least one kind of remote multimedia data to the storage unit.