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Re: DES算法及其应用误区
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a*t
2

I think what he said is true. But we do not have to worry about it. Because
it is explictly stated that only 56 bits in the 64 bits key are useful. Also,
there are some weak keys.
Since single DES is not as secure as we need, people begun to use 3DES.

【在 w**w 的大作中提到】
: yes this is false
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