通过一个实例分析，显示了一次一密并不具有完善保密性。
An example is analyzed to show that one-time-pad is not perfectly secure.
一旦他们完善了瓷砖工艺，他们就将其保密，再隐瞒一千年！
Once they had perfected tile process, they kept it a secret, for another thousand years!
第四部分是关于银行保密制度完善的建议。
The fourth part is about banking secrecy system improvement suggestion.
第四部分是关于银行保密制度完善的建议。
The fourth part is about banking secrecy system improvement suggestion.
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