密码学 关于随机数测试 NIST的sp800-22

用这个链接下载： http://csrcnistgov/groups/ST/toolkit/rng/documents/sts-211zip

说明见： http://csrcnistgov/groups/ST/toolkit/rng/documentation_softwarehtml

Little John used to live at ease, because he has a happy family and has lots of friends at school That's why he thought when it was time to elect the monitor of the class He was most likely to be the one However, to his surprise, nobody voted for him! He felt he lost face He was so angry that he turned his back to all his friends He wanted to find an opportunity to defend against all his so-called friends and find out the reason of his failure

prep（介词）

(1)

In a direction or course opposite to:

逆：与某个方向或过程相反：

row against the current

逆水行舟

(2)

So as to come into forcible contact with:

对撞：为与…达成猛烈接触：

waves dashing against the shore

拍岸的波涛

(3)

In contact with so as to rest or press on:

倚在；紧靠着：与…接触为了休息或按压：

leaned against the tree

斜靠着树

(4)

In hostile opposition or resistance to:

反抗；抵抗：处于敌对状况或与…相抗衡：

struggle against fate

同命运抗争

(5)

Contrary to; opposed to:

与…相反；对：

against my better judgment

与我的判断相反

(6)

In contrast or comparison with the setting or background of:

对照；对比：以…的布景或背景相对比：

dark colors against a fair skin

深色衬托出白皙的肌肤

(7)

In preparation for; in anticipation of:

预期；以备：为…作准备；期待着…：

food stored against winter

为过冬贮备的食物

(8)

As a defense or safeguard from:

预防；防御：以…为防御或保护对象：

protection against the cold

预防感冒

(9)

To the account or debt of:

兑换；提取：作为帐上的应收款项或作为…的借项：

drew a check against my bank balance

开支票支取自己的银行结余

(10)

Directly opposite to; facing

正对着；面向

语源

--------------------------------------------------------------------------------

(1)

Middle English

中古英语

(2)

alteration of againes

againes的变化

(3)

from Old English ongeagn

源自 古英语 ongeagn

现代英汉词典

--------------------------------------------------------------------------------

against

[E5^eInst, E5^enst]

prep

(1)

相反；逆着

against the law

违法

We sailed against the wind

我们逆风行船。

Drug taking is against the law

吸毒是违法的。

(2)

反对

We won our match against that team

我们在比赛中赢了那个队。

No one is against this proposal

没有人反对这个提议。

(3)

靠着，依着

to lean against the wall

靠着墙

(4)

与…成对照

against a dark background

与黑色背景成对照

The picture looks better against the light wall

这幅画挂在浅色的墙上显得更美。

(5)

防备；防御

against the cold

防冷

against a rainy day

防备雨天

We are all taking medicine against the flu

我们都在服药预防流感。

(6)

以…相抵

income against expenditure

以收抵支