Method of protecting data saved to recording medium and disk drive adopting the method

An apparatus to record and reproduce data, the apparatus comprising:

• a disk storing data;
• a spindle motor rotating the disk;
• a pickup recording data to, and reading data from, the disk;
• a sled motor moving the pickup;
• a servo control unit controlling a rotating speed of the disk and movement of the pickup;
• a signal processing circuit performing signal processing according to a recording mode or a reproducing mode;
• and
• a controller controlling a recording process and a reproducing process,
• the recording process comprising
• storing password information set in the recording mode and key information to a first area of the disk,
• encrypting location information of the first area,
• storing the encrypted location information to a second area of the disk,
• encrypting desired data and an address of the desired data using the key information, and
• recording the encrypted data at the encrypted address, and
• the reproducing process comprising, when the password information is received in the reproducing mode,
• reading the encrypted location information saved to the second area of the disk,
• decrypting the encrypted location information of the first area,
• reading the password information saved to the first area,
• comparing the received password information with the read password information, and
• when the received password information is identical to the read password information, reading the key information saved to the first area and reproducing the desired data and the address using the read key information.

An apparatus to record and reproduce data, the apparatus comprising:

• a disk storing data;
• and
• a controller controlling a data recording process and a data reproducing process,
• the data recording process comprising
• storing password information set in the recording mode and key information to a first area of the disk,
• encrypting location information about the first area,
• storing the encrypted location information to a second area of the disk,
• encrypting desired data and an address of the desired data using the key information, and
• recording the encrypted data at the encrypted address, and
• the reproducing process comprising, when the password information is received in the reproducing mode,
• reading the encrypted location information saved to the second area of the disk,
• decrypting the encrypted location information about the first area,
• reading the password information saved to the first area,
• comparing the received password information with the read password information, and
• when the received password information is identical to the read password information, reading the key information saved to the first area and reproducing the desired data and the address using the read key information.

A method of recording data to a disk, the method comprising:

• storing password information set in a recording mode and key information to a first area of the disk;
• encrypting location information of the first area;
• storing the encrypted location information to a second area of the disk;
• encrypting desired data and an address of the desired data using the key information;
• and
• recording the encrypted data at the encrypted address.

A method of reproducing data from a disk, the method comprising:

• reading, when password information is received in a reproducing mode, encrypted location information saved to a second area of the disk;
• decrypting encrypted location information of a first area of the disk;
• reading password information saved to the first area;
• comparing the received password information with the read password information;
• and
• reading, when the received password information is identical to the read password information, key information saved to the first area and reproducing desired data and an address of the desired data using the read key information.

An apparatus to record data, the apparatus comprising:

• a disk storing data;
• a spindle motor rotating the disk;
• a pickup recording data to the disk;
• a sled motor moving the pickup;
• a servo control unit controlling a rotating speed of the disk and movement of the pickup;
• a signal processing circuit performing signal processing according to a recording mode;
• and
• a controller controlling a recording process comprising
• storing password information set in the recording mode and key information to a first area of the disk,
• encrypting location information of the first area,
• storing the encrypted location information to a second area of the disk,
• encrypting desired data and an address of the desired data using the key information, and
• recording the encrypted data at the encrypted address.

An apparatus to reproduce data, the apparatus comprising:

• a disk storing data;
• a spindle motor rotating the disk;
• a pickup reading data from the disk;
• a sled motor moving the pickup;
• a servo control unit controlling a rotating speed of the disk and movement of the pickup;
• a signal processing circuit performing signal processing according to a reproducing mode;
• and
• a controller controlling a reproducing process comprising, when password information is received in the reproducing mode,
• reading encrypted location information saved to a second area of the disk,
• decrypting encrypted location information of a first area of the disk,
• reading password information saved to the first area,
• comparing the received password information with the read password information, and
• reading, when the received password information is identical to the read password information, key information saved to the first area and reproducing desired data and an address of the desired data using the read key information.