Joint security and performance enhancement for secure arithmetic coding

This paper studies the joint security and performance enhancement of secure arithmetic coding (AC) for digital rights management applications. The proposed cryptosystem incorporates the interval splitting AC with a simple bit-wise XOR operation step. Security analysis results show that the proposed scheme provides satisfactory level of security against the cipher-only attack, the chosen-plaintext attack and the chosen-ciphertext attack. Due to the elimination of the input symbol-wise permutation step, our proposed scheme can be extended conveniently to any context-based coding scenarios. In addition, the implementation complexity of our proposed scheme is lower than the original secure AC. Finally, we suggest a selective encryption version of our proposed scheme, which further reduces the implementation complexity.