说明：  如果顺序选取像素点进行信息隐藏，势必会造成图象各部分统计特征的不一致，而导致了严重的安全问题。载体的第一部分和第二部分，也就是修改的部分和没有修改的部分，具有不同的统计特性，增大了攻击者对秘密通信的可能性。为了解决这个问题，可以随机间隔选取像素序列。此嵌入与提取算法与前面一小节所描述的顺序隐秘的算法基本相同，只是在选取像素序列时不再顺序而是随机间隔的选取。
(order if selected pixel information hidden, it is bound to be part of the image characteristics of the statistical inconsistencies, which led to a serious security problem. Vector of the first and second parts, which is part of the changes and no changes, with different statistical characteristics, increase the attacker on the possibility of secret communication. To solve this problem, it can randomly selected pixel spacing sequence. This insertion and extraction algorithm and a front section, as described in the order hidden algorithm basically the same, only selected pixels in sequence but not random sequence selected intervals.)