求模运算d×e=1 mod 160 ,已知e=7,请问d=?这是加密的一个运算例子,鄙人数学不好,望指教,是怎么算出来的.
依题意有de=160k+17d=160k+1d=（160k+1）/7=23k+(1-k)/7所以k=1mod 7设k=7m+1d=23k+(1-k)/7=161m+23-m=160m+23 （m为整数）
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扫描下载二维码commodious
[k?'m??d??s]
[k?'mod??s]
adj. 宽敞的；方便的
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[ broaden ] 使开阔 增加知识
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commodious
[ k?'m?udj?s ]
large and roomy (`convenient' is archaic in this sense)
&a commodious harbor&; & a commodious building suitable for conventions&
以上来源于:
commodious
[k?'m?udj?s]
宽敞的，宽大的
合适的，方便的
以上来源于：《21世纪大英汉词典》
commodious
/k?'m??d??s/
A commodious room or house is large and has a lot of space. 宽敞的
[usu ADJ n]
adj. 宽敞的；方便的
Designed as cruisers, many ketches are heavier, more stable in sea conditions, and more commodious down below.
因为它们生来就是为了远行之用，因此它们通常更重，在各种海洋状况下更稳定， 船舱也更宽敞。
“The Coffee houses particularly are very commodious for a free Conversation, and for reading at an easie Rate all manner of printed News,” noted one observer.
“尤其是咖啡馆，是一个非常宽敞的自由交谈之处，来阅读与评论形形***的印刷新闻”，一个观察员指出。
“The Coffee houses particularly are very commodious for a free Conversation, and for reading at an easie Rate all manner of printed News,” noted one observer.
一名观察家说，“尤其是咖啡馆，因其宽敞开阔的空间，很适合人们进行自由交谈，还可以舒舒服服的阅读各种新闻印刷品”。
With both doors open, HCD-14 Genesis has an inviting and commodious cabin ambience.
London taxis are designed to be commodious to an English gentleman's top hat in the back seat and a trans-Atlantic steamship chest in the trunk.
Under the shelter of strong government, humankind can enjoy "commodious living" - Hobbes' term for a civilised mode of life in which we can live and work together without fear.
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