CAJ | 학술논문

针对目前研究地形图图像加密算法较少，以及现有图像加密算法易被破解的问题，提出基于Shear变换的彩色地形图混沌加密算法。该算法充分利用了Shear变换的多方向性，能够很好地对地形图的线划要素信息进行置乱的特点，以及Lorenz混沌系统具有极强初值敏感性和更大的密匙空间和安全性的特点。通过对彩色地形图的加密和解密实验，以及抗攻击性能对比实验，表明使用该算法加密后的彩色地形图具有更高的安全性，并且载体图像具有较高的抗攻击性能。
침대목전연구지형도도상가밀산법교소，이급현유도상가밀산법역피파해적문제，제출기우Shear변환적채색지형도혼돈가밀산법。해산법충분이용료Shear변환적다방향성，능구흔호지대지형도적선화요소신식진행치란적특점，이급Lorenz혼돈계통구유겁강초치민감성화경대적밀시공간화안전성적특점。통과대채색지형도적가밀화해밀실험，이급항공격성능대비실험，표명사용해산법가밀후적채색지형도구유경고적안전성，병차재체도상구유교고적항공격성능。
A chaotic encryption algorithm for color topographic maps,which is based on the shear transform,is proposed to solve the problems that image encryption algorithms for topographic maps is less studied and the existing image encryption al-gorithm is easy to decode. This algorithm makes full use of the multi-direction features of Shear transform,the characteristic of effectively scrambling the feature information of lines in topographic maps,and the characteristics that the Lorenz chaotic system is extremely sensitive to the initial value,has larger key space and security. The encryption and decryption experiments for color topographic maps indicate that the proposed algorithm has higher security and strong resistance to various attacks.