Method and storage device for protecting content

1. A method for authenticating a memory device by a controller device, the method comprising:

sending, by the controller device, a pre-stored number, a random number and key position information to the memory device;

receiving, the controller device, authentication information from the memory device;

verifying, the controller device, the authentication information using verification data; and

if verification succeeds, generating, by the controller device, an Enhanced Media IDentifier (EMID) of the memory device using an IDentifier (ID) of the memory device and a pre-stored value.

2. The method of claim 1 , further comprising;

receiving, by the controller device, encrypted content from the memory device; and

decrypting, by the controller device, the encrypted content with a key being a random value.

3. The method of claim 1 , further comprising;

reading, by the controller device, an encrypted ID of the memory device from the memory device; and

decrypting, by the controller device, the encrypted ID of the memory device using a key stored in the controller device.

4. The method of claim 1 , further comprising:

reading, by the controller device, data including the key position information from the memory device.

5. A non-transitory computer-readable recording medium having recorded thereon a computer program for executing a method of authenticating a memory device by a controller device, the method comprising:

sending, by the controller device, a pre-stored number, a random number and key position information to the memory device;

receiving, by the controller device, authentication information from the memory device;

verifying, by the controller device, the authentication information using verification data; and

if the verification succeeds, generating, by the controller device, an Enhanced Media IDentifier (EMID) of the memory device using an IDentifier (ID) of the memory device and a pre-stored value.

6. The non-transitory computer-readable recording medium of claim 5 , the method further comprising;

receiving, by the controller device, encrypted content from the memory device; and

decrypting, by the controller device, the encrypted content with a key being a random value.

7. The non-transitory computer-readable recording medium of claim 5 , the method further comprising;

reading, by the controller device, an encrypted ID of the memory device from the memory device; and

decrypting, by the controller device, the encrypted ID of the memory device using a key stored in the controller device.

8. The non-transitory computer-readable recording medium of claim 5 , the method further comprising reading, by the controller device, data including the key position information from the memory device.

9. A controller device for authenticating a memory device, comprising:

a non-transitory storage area for storing a pre-stored number and a pre-stored value; and

a controller configured to:

send the pre-stored number, a random number and key position information to the memory device;

receive authentication information from the memory device;

verify the authentication information using verification data; and

if the verification succeeds, generate an Enhanced Media IDentifier (EMID) of the memory device using an IDentifier (ID) of the memory device and the pre-stored value.

10. The controller device of claim 9 , wherein the controller is configured to:

receive encrypted content from the memory device; and

decrypt the encrypted content with a key being a random value.

11. The controller device of claim 9 , wherein the controller is configured to:

read an encrypted ID of the memory device from the memory device; and

decrypt the encrypted ID of the memory device using a key stored in the controller device.

12. The controller device of claim 9 , wherein the controller is configured to read data including the key position information from the memory device.

13. A method for performing authentication between a memory device and a controller device, the method comprising:

sending, by the memory device, data including key position information to the controller device;

receiving, by the memory device, a number pre-stored in the controller device, a random number and the key position information from the controller device;

generating, by the memory device, authentication information based on a key which is stored in the memory device and corresponds to the key position information; and

sending, by the memory device, the authentication information to the controller device.

14. The method of claim 13 , further comprising sending, by the memory device, encrypted content to the controller device,

wherein the encrypted content is content encrypted with a key being a random value.

15. The method of claim 13 , further comprising sending, by the memory device, an encrypted ID of the memory device to the controller device.

16. A memory device for performing authentication between the memory device and a controller device,

at least one non-transitory storage area for storing an encrypted ID of the memory device and a plurality of keys; and

a processor configured to:

send data including key position information to the controller device;

receive a number pre-stored in the controller device, a random number and the key position information from the controller device;

generate authentication information based on a key which is one of the plurality of keys and corresponds to the key position information; and

send the authentication information to the controller device.

17. The memory device of claim 16 , wherein the processor is configured to send encrypted content to the controller device, and

wherein the encrypted content is content encrypted with a key being a random value.

18. The memory device of claim 16 , wherein the processor is configured to send an encrypted ID of the memory device to the controller device.