Multimedia data encryption via random rotation in partitioned bit streams
Multimedia data encryption via random rotation in partitioned bit streams
复制标题
通过分区比特流中的随机旋转进行多媒体数据加密
DOI：
10.1109/iscas.2005.1465890
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
C.
中科院分区：
文献类型：
--
作者：
Dahua Xie;C.
本文提出了一种新的多媒体压缩码流加密方法，该码流是任何压缩系统在最后一级使用熵编码器的输出。其基本思想是将编码比特流划分为随机大小的块，并在每个块中执行随机旋转。该加密方案要求计算开销低，并且不会增加压缩比特流的大小。对纯密文攻击和已知/选择明文攻击的安全性分析表明，该算法具有较高的安全性。
A new method to encrypt a compressed multimedia bit stream, which is the output of any compression system using an entropy coder in the last stage, is proposed in this research. The basic idea is to partition a coded bit stream into random-sized blocks and perform a random rotation in each block. The proposed encryption scheme demands low computational overhead and does not increase the size of compressed bit stream. Security analysis to both the ciphertext-only attack and the known/chosen-plaintext attack shows that the proposed algorithm achieves high security.