long n. 朗〔姓氏〕。 vi. 渴想,极想,渴望 (for, 〔古语〕 after to do)。 adj. (longer longest ) 1.长,长的。 a long way 远距离。 a long way off 离得很远。 It is five feet long. 这有五英尺长。 2.个子高的。 a long man 高个子的人。 3.长久的,长期的。 a long friendship 长期的友谊。 a long memory 长久不忘的好记性。 a long note 远期票据。 It will be long before we know the truth. 很久以后真相才会大白。 It will not be long before we know the truth. 不久真相就会大白。 Now we shan't be long! 〔口语〕这回就好啦! 4.冗长的,拖长的。 Don't be long about it! 别慢吞吞的。 She is long in coming. 她姗姗来迟。 5.…以上,足足。 three long hours 足足三小时。 a long mile 一英里以上。 6.达到远方的。 have a long arm (为了扩张势力)把手伸到老远。 take a long view of the matter 从长远考虑这事。 7.〔诗〕长音的,重读的;【语音】长音(节)的。 8.【商业】行情看涨的,做多头的。 be on the long side of the market. 做多头。 9.长于…的。 be long on understanding 理解力强。 10.众多的,充足的,大的。 Corn is in long supply. 谷物供应充足。 fetch long prices 售得高价。 have a long family 有很多子女。 read a long list of books 读很多书。 as broad as it is long 反正都一样。 as long as 1. 长达…,达…之久 (as long as five years 长达五年之久)。 2. = so long as. as long as one's arms 极长。 at (the) longest 至多。 be long in ...ing 很不容易… (Spring is long in coming. 春天好不容易才来)。 before (very) long 不(需很)久。 by a long chalk = by long chalks 〔口语〕在很大程度上,远远,…得多。 make a long arm 把手伸得老远。 make a long guess 作大致估计。 not by a long chalk [shot] 绝不;差得远。 one's long home 坟墓 (go to one's long home 死)。 adv. 1.长久;久已。 The opportunity was not long (in) coming. 机会不久就来了。 He will not be long for this world. 他活不了多久了。 I have long been meaning to write. 我早就想写信了。 It was long before he recovered. 他的病好久才痊愈。 2.始终。 all day [night] long整天[夜]。 all one's life long一辈子。 3.遥远地。 a long-travelled person 曾到远处旅行的人。 any longer 〔用于否定〕(不)再 (I shall not wait (any) longer. 我不再等了)。 how long? 多久 (How long have you been here 你来了多少时候?)。 long after 很久之后。 long ago [since] 老早[以前]。 long before 老早以前。 no longer 已不,不再。 So long 〔口语〕再见! so long as 只要 (Stay so long as you like. 只要你喜欢尽管待在这儿好啦)。 n. 1.长期间。 It will not take long. 这不需要很多时间。 2.〔the L-〕 =long vacation. 3.〔pl.〕 【商业】看涨的人,做多头的人。 (opp. shorts). 4.【语音】长母音;长音节;长子音。 5.(服装的)长尺寸;〔pl.〕长裤。 for long 长久 longs and shorts 1. 诗〔尤指古希腊的和古拉丁的〕。 2. 【建筑】长短砌合。 the long and the short of it is that... 要点,梗概,总之。 adv. -ly ,-ness n.
Block ciphers with long keys are stronger than stream ciphers 使用长密钥的块密码比流密码更强。
Long keys generally yield stronger encryption than short keys 长密钥通常会比短密钥生成更强的加密。
Encrypting long keys could potentially exceed key length restrictions 如果加密较长的键,则可能超出长度限制。
In general , longer keys are more secure in other words , more resistant to attack than shorter ones 通常,较长的密钥比较短的密钥更安全(换句话说,更能抵抗攻击) 。
This does not mean , however , that one should merely select the algorithm that supports the longest key - a particular application may not require the highest level of security 但是,不是说只需选择支持最长密钥的算法一个特定的应用程序可能不需要最高级别的安全性。
Triple des usually abbreviated 3des or des3 uses the same algorithm as des , but increases the algorithm s security by employing longer keys of up to 192 bits 168 bits of effective length once the " parity " bits are removed and iterative calls of the des algorithm Triple des (常简称为3des或des3 )使用与des相同的算法,但是通过采用更长的多达192位(除去每个字节的1个“奇偶”位,实际有效长度为168位) ,并重复调用des算法,增强了算法的安全性。
This is a contradiction to save a gradually longer key in a limit room . we proposed a solution to combine the elliptic curve cryptosystem and digital - image - hiding , the advantage of ecc ’ s shorter key at the same security level will solve the problem in some extent , at the same time make the transfer of document secure and also cryptic 通过对现有商务文档安全传输策略的研究和对比后,本文提出将椭圆曲线密码体制与图像隐藏结合,利用ecc在相同安全强度下密钥长度短的特点在一定程度上解决这一矛盾,同时达到安全性和隐蔽性的结合,能在一定程度上解决第三方的攻击。