Eavesdropper could , in theory , steal an extra photonanduse it to help decodeamessage .

理论上,窃听者可以偷取额外的光子,拿它来协助解开讯息.

" And what did you think of this fine story , eavesdropper ? "

“偷听者，你对这个美丽的故事怎么看？”

By means of this algorithm an eavesdropper is unable to get any meaningful information about the source , which we call practical security .

应用该算法，窃听者得不到关于信源的任何有意义的信息，称之为弱安全．

For example , use of a hash-based challenge-response authentication method for password verification may provide a hashed password to an eavesdropper , who can then crack the password .

例如使用散列的挑战-响应认证密码验证方法可提供一个口令一个乱后窃听,那么谁能破解密码.

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。