CAJ | 학술논문

迄今为止大部分信息隐藏方面的研究都是运用经典DCT算法，并通过混沌和迭代算法选择嵌入位置，以实现对隐藏信息的加密，但该方法的安全性不高。针对该问题，提出一种改进的信息隐藏算法。该算法先将图像与密文数据进行交换，再将密文嵌入图像。．在选择交换数据和嵌入位置时都借鉴遗传算法思想，交换数据后不会改变图像的显示效果。仿真实验表明：通过本算法加密后的图像，按照传统方法提取的密文将是乱码，起到了信息隐藏的作用，密文的安全性明显提高。
흘금위지대부분신식은장방면적연구도시운용경전DCT산법，병통과혼돈화질대산법선택감입위치，이실현대은장신식적가밀，단해방법적안전성불고。침대해문제，제출일충개진적신식은장산법。해산법선장도상여밀문수거진행교환，재장밀문감입도상。．재선택교환수거화감입위치시도차감유전산법사상，교환수거후불회개변도상적현시효과。방진실험표명：통과본산법가밀후적도상，안조전통방법제취적밀문장시란마，기도료신식은장적작용，밀문적안전성명현제고。
So far, the most researches about information hiding adopt the classical DTC algorithm and encode information by using chaotic algorithm and iterative algorithm to select embedding position, but the security of the method isn＇ t high. On this basis, the paper proposed an improved information hiding algorithm. First the algorithm exchanges the carrier and cryptograph, embeds the cryptograph into the carrier. The selecting processes of exchanging data and embedding position both use the thought of genetic algorithm, and display effect of the carrier doesn＇ t alter through exchanging data. Simulation experiment shows that the cryptograph extracted from the carrier encoded by the improved algorithm, and by traditional method will be messy code. The algorithm is effective in information hiding, and the security of cryptograph has been improved a lot.