基于混沌系统与多方向扩散的图像加密算法

发布时间：2018-07-10 03:35

本文选题：图像加密 + 混沌系统　；参考：《包装工程》2017年23期

【摘要】：目的为了避免只从单一方向来扩散图像像素,并提高加密密文的安全性,设计了混沌系统与多方向连续扩散的图像加密算法。方法综合Tent,sine映射,联合改进的Logistic映射,设计混合混沌机制,将Logistic模型的输出值作为触发器,获取一组随机性较强的混沌序列,对初始明文进行交叉置乱,高度混淆其像素位置,有效降低置乱周期性;构建量化机制对混沌序列进行处理,获取密钥流,从而设计多方向连续扩散机制,从4个不同的方向,利用不同的扩散模型来改变像素值,显著降低扩散周期性。结果实验结果显示,与当前混沌加密机制相比,所提算法具有更高的安全性与敏感性。结论所提加密算法能够确保图像在网络中安全传输,在包装信息防伪等领域具有较好的应用价值。
[Abstract]:In order to avoid spreading image pixels from a single direction and improving the security of encrypted ciphertext, the image encryption algorithm of chaotic system and multi direction continuous diffusion is designed. The method combines Tent, sine mapping, combined improved Logistic mapping, and a hybrid chaotic mechanism is designed, and the output value of the Logistic model is used as a trigger. The chaotic sequence with strong randomness is scrambled intersecting the initial plaintext, highly confusing its pixel position, effectively reducing the periodicity of the scrambling, constructing the quantization mechanism to process the chaotic sequence and obtaining the key stream, thus designing the multi direction continuous diffusion mechanism, using different diffusion models to change the pixel value from 4 different directions. The experimental results show that the proposed algorithm has higher security and sensitivity compared with the current chaotic encryption mechanism. Conclusion the proposed encryption algorithm can ensure the safe transmission of the image in the network, and has good application value in the fields of packaging information anti-counterfeiting.
【作者单位】：重庆城市职业学院;贵州师范大学;
【基金】：国家重点基础研究发展计划(2014CB340600) 国家自然科学基金(61332019) 贵州省科技合作计划(黔科合LH字[2015]7763号)
【分类号】：TP309.7;TP391.41

【相似文献】