摘要
首次提出了一种基于多级多层置乱的数字图像新型加密算法。对置乱策略、方法与步骤等关键技术进行了详细讨论。该算法依据信息密级,把置乱划分为初、中、高三个等级,通过逐步深化的置乱层,复杂像素位置变换,然后利用非对称椭圆曲线密码体制(ECC)对系列关键参数进行加密。实验例证对算法的安全性、可靠性和效率进行了验证与分析。表明该算法具有足够大的密钥空间,破译耗时趋于+∞,安全性能好和加密效率高等突出优点。为满足航空航天、军事机要、国家安全等领域网络平台下的高机密信息安全交互需求,提供了一条新途径。
A new image encryption algorithm based on multi-level and multilayer scramble is proposed in this paper. All the strategies, programs, parameters, encryption and decryption steps and other key technologies are given in detail. Based on the secure degree, the scrambling program divides into primary, intermediate and advanced levels, whose security gradually deepen with the level. The key parameters are encrypted by Elliptic Curve Cryptography （ECC）. We verify and analyze the algorithm security, reliability and efficiency with an experiment. The experiment results and algorithm analyses indicate that the new algorithm possesses a large key space and high level security and the time needed for encrypting the interactive image tends to ＋0o It provides a new access to satisfy high level security of interactive information requirements in the fields of aerospace, military, confidential, financial and economic, national security and so on.
关键词
图像加密
加密算法
多级置乱
图元
image encryption
encryption algorithm
multi-level scrambling
image element
