Content protection apparatus and content encryption and decryption apparatus using white-box encryption table

A content encryption apparatus using a white-box encryption table, the apparatus comprising:

• a user registration unit configured to collect, when a user subscribes as a member, user information of the user and store the user information in a user information database;
• a random number generation unit configured to generate a random number based on the user information stored in the user information database;
• a key generation unit configured to generate an encryption key for each content;
• a table generation unit configured to generate a table part 1 based on the random number and a table part 2 based on the encryption key, and provide the table part 1 and the table part 2 to a client device of the user;
• and
• a content encryption unit configured to encrypt contents requested by the user based on the white-box encryption table including the table part 1 and the table part 2,
• wherein the table generation unit is configured to first generate the table part 1 and provide the table part 1 to the client device of the user, and then, when there is a content request from the client device, generate the table part 2 and provide the table part 2 to the client device.

A content decryption apparatus for decrypting encrypted contents using a white-box encryption table that includes a table part 1 and a table part 2, the content decryption apparatus comprising:

• a first storage unit configured to receive the table part 1 from a server device when a user accesses the server device and subscribes as a member, and store the same;
• a second storage unit configured to receive the table part 2 from the server device when the user requests contents from the server device, and store the same;
• a control unit configured to extract the table part 1 and the table part 2, which correspond to the requested contents, from the first and second storage units, respectively;
• and
• a content decryption unit configured to decrypt encrypted contents corresponding to the requested contents based on the table part 1 and the table part 2 extracted by the control unit,
• wherein the table part 1 includes a random number generated based on user information, and the table part 2 is generated using a content encryption key.