3. Reading the book is like being an eavesdropper as two companions take a long country walk. 读这本书就像是偷听两个在乡村道路上漫步的人一样。
4. That third party Eavesdropper do not know whether there is a general document which embedding secret information. 即第三方无从知道一般文档里面是否还有秘密信息。
5. If we reused the key, the eavesdropper would likely see a different value placed on the network due to the random padding. 通过这样一填充,即使我们重用密钥,偷听者在网络上两次看到的数也是不一样的。