秘密通信是指要隐藏通信的实际存在。
Secret communication is to hide the existence of communication.
两人因拍照而见面，后来就开始秘密通信。
The two met up for the shoot, and afterwards began a secret correspondence.
禁止在私人交往和通信中涉及国家秘密。
It shall be prohibited to refer to any state secret in private contact or correspondence.
信息隐藏是将秘密信息隐藏于其他掩护媒体而进行传输的一种保密通信方式。
Information hiding is a secret communicative way by hiding secret information in other secure media.
在私人交往和通信中涉及国家秘密的；
Referring to any state secret in private contact or correspondence;
在私人交往和通信中涉及国家秘密的；
Referring to any state secret in private contact or correspondence;
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