Content protection apparatus and method using binding of additional information to encryption key
The present invention relates to a content protection apparatus and method using binding of additional information to an encryption key. The content protection apparatus includes an encryption unit for creating an encryption key required to encrypt data requested by a user terminal and then generating encrypted data in which the data is encrypted. An additional information management unit manages additional information including authority information about the encrypted data. A White-Box Cryptography (WBC) processing unit generates a WBC table required to bind the encryption key corresponding to the encrypted data to the additional information. A bound data generation unit generates bound data in which the encrypted key is bound to the additional information, using a cipher included in the WBC table.
Electronics and Telecommunications Research Institute
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Hyun-Sook Gun-Tae Sin-Hyo Byung-Ho Jung-Yeon Yun-Kyung Sok-Joon Sang-Woo Hye-Ran
Cho Bae Kim Chung Hwang Lee Lee Lee Mun