【摘要】 对Logistic映射混沌序列生成方法作了一些改进,改进后生成的序列不仅克服了一维混沌序列的短周期行为,而且统计性能有了一定程度的改善。提出了一种基于此混沌序列的JPEG格式数字图像加密算法,通过在图像压缩的同时执行加密运算,使密图具有良好的压缩效率,试验表明加密效果是令人满意的。更多还原

【Abstract】 Some improvement is presented for producing the chaotic sequence based on Logistic mapping.The method overcomes the disadvantage of short period which usually appears with one dimension chaos system.Further more,the new chaotic sequence takes on better random statistical property.A JPEG digital image encryption algorithm is proposed based on chaotic sequences above,which is implemented during image compression.Encryption image according to this method takes on quite compression efficiency.Experimental results show that encryption effect is satisfactory.更多还原