Finely Tunable Bitcuboid-Based Encryption With Exception-Free Signed Binarization for JPEG Standard
Finely Tunable Bitcuboid-Based Encryption With Exception-Free Signed Binarization for JPEG Standard
复制标题
基于 Bitcuboid 的可微调加密，具有适用于 JPEG 标准的无异常签名二值化
DOI：
10.1109/tifs.2021.3113510
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发表时间：
2021
影响因子：
6.8
通讯作者：
Kosuke Shimizu and Taizo Suzuki
中科院分区：
文献类型：
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作者：
Nara Yasuhiko;Kitaura Hideki;Ogawa Saika;Shen Wei-Ren;Qi Jiawei;Ohori Fumitoshi;Noguchi Takahiro;Marahleh Aseel;Pramusita Adya;Kinjo Ria;Mizoguchi Itaru;Kosuke Shimizu and Taizo Suzuki
我们提出了一种可调的JPEG格式兼容的感知加密(FE)和两种新的策略：(I)基于位立方体的加密(BE)和(Ii)无异常符号二值化(ESB)。BE是一种位平面内和位平面间加密技术，其通过加密长方体形状的位集(位立方体)的约束子空间(位立方体)来提供可精细调节的感知降级。ESB是一种二进制化技术，它通过逐个移位负二进制序列，将加密的二进制序列重新十进制为带符号的十进制系数，而无需任何异常处理。将BE和ESB(BEESB)应用于JPEG压缩中的量化离散余弦变换(QDCT)域。第一个实验的结果表明，通过组合加密不同类型和大小的比特立方体，BE获得了良好的可调性，这意味着使用单一的加密方法可以扩展感知退化水平。第二个实验的结果表明，BEESB抑制了比特率开销，与传统方法相比，除了一些方法外，采用最安全的选项之一的BEESB抑制了大约0.80-187.58%的比特率开销。第三次实验的结果表明，BEESB具有很强的抗攻击能力。
We propose a finely tunable JPEG format-compliant perceptual encryption (FE) with two novel strategies: (i) bitcuboid-based encryption (BE) and (ii) exception-free signed binarization (ESB). BE is an intra- and inter-bitplane encryption technique that provides finely tunable perceptual degradation by encrypting constrained subspaces (‘bitcubes’) of a cuboid-shaped bit set (‘bitcuboid’). ESB is a binarization technique that redecimalizes encrypted binary sequences into signed decimal coefficients without any exception-handling by shifting the negative binary sequences one-by-one. BE with ESB (BEESB) is applied to the quantized discrete cosine transform (QDCT) domain in JPEG compression. The results of our first experiment show that the BE attains fine tunability, which means scalability of the perceptual degradation level with a single encryption method, by encrypting bitcubes of various types and sizes combinatorially. The results of our second experiment show that the BEESB suppresses the bitrate overheads and that BEESB with one of the most secure options suppresses approximately 0.80-187.58 % more of the bitrate overheads in terms of Bjøntegaard delta (BD)-rate compared with conventional methods except for some ones. The results of our third experiment show that BEESB has high resilience against attacks.