Method, system and controller for transmitting and dispatching data stream

A method for transmitting and dispatching data stream, suitable for transmitting data stream to a storage device having a non-volatile memory a controller and a smart card chip from a host, the method for transmitting and dispatching data stream comprising:

• setting a key between the host and the storage device;
• creating a temporary file on a logical block address of the non-volatile memory, generating a first value, generating a second value by encrypting the first value via the key and transmits a key verification writing command for writing the first value and the second value into the temporary file to the storage device by the host;
• receiving the key verification writing command with the first value and the second value, decrypting the received second value to obtain a third value, determining whether the third value is the same as the received first value and when the third value is the same as the received first value, recording the logical block address of the temporary file by the controller;
• judging whether the data stream transmitted to the storage device from the host is written to the logical block address of the temporary file by the controller;
• and
• wherein when the data stream is written to the logical block address of the temporary file, the data stream is then identified to be a communication data unit of the smart card chip, and is dispatched to the smart card chip by the controller.

A controller, for a storage device having a non-volatile memory and a smart card chip, the controller comprising:

• a micro processing unit;
• a memory interface, coupled to the micro processing unit for accessing the non-volatile memory;
• a buffer memory, coupled to the micro processing unit for temporarily storing data;
• and
• a data dispatching module, coupled to the micro processing unit,
• wherein the data dispatching module receives a key and stores the key,
• wherein the data dispatching module receives a key verification writing command for writing a first value and a second value into a temporary file, decrypts the received second value to obtain a third value, determines whether the third value is the same as the received first value and when the third value is the same as the received first value, records a logical block address of the temporary file,
• wherein the data dispatching module judges whether a data stream transmitted to the storage device from the host is written to the logical block address of the temporary file,
• wherein when the data stream is written to the logical block address of the temporary file, the data steam is then identified to be a communication data unit of the smart card chip and the data dispatching module dispatches the data stream to the smart card chip.

A method for transmitting and dispatching data stream, suitable for receiving data stream to be transmitted to a storage device having a non-volatile memory and a smart card chip from a host, the method for transmitting and dispatching data stream comprising:

• verifying a key verification writing command received from a host through a key;
• recording a logical block address of a temporary file in the non-volatile memory to be written by the key verification writing command when the verification of the key verification writing command is successful;
• and
• judging whether the data stream transmitted to the storage device from the host is written to the logical block address of the temporary file,
• wherein when the data stream is written to the logical block address of the temporary file, the data stream is then identified to be a communication data unit of the smart card chip, and is dispatched to the smart card chip.