查询词典 hash coded

It takes Hash algorithm as main idea, and speeding hash search with the localness of flow.

静态的规则库比如路由表查找中的路由表，包过滤技术中的过滤器等；动态规

MD4 and f RIPEMD.and used the two of the fortieth power Hash operates under any initial value to give the collision of the SHA-0 This means that the algorithms of security authentication extensively applied currently in the electronic commerce,bank system,and slock system tumblingly breaks down,which is the field of Hash function analysis.

这意味着目前广泛应用于电子商务、银行系统、证卷系统的安全认证算法？？Hash函数分析领域堡垒的轰然倒塌。面对严峻而残酷的现实，依赖于Hash算法的银证系统数据安全传输问题，也就成为人们不得不及时解决的实际问题。

Hash A unary function object type that acts a hash function for a Key .

一元函数对象类型，用作 Key 的散列函数。

Hash A unary function object type that acts a hash function for a Key .

一元函数对像类型，用作 Key 的散列函数。

Along with the password attack method unceasing renewal, the computation ability unceasing enhancement as well as to the operating speed request, the tradition disperses row algorithm MD5, SHA has demonstrated their shortcoming and the insufficiency day by day, and thestructure of hash function is mostly based on block cipher algorithm DES, but the HASH function security is established above the grouping function security, because the DES operand is very big, the operating speed very slowly by and its itself some characteristics, therefore disperses a row function based on the DES algorithm to have potential unsecurity.

随着密码攻击手段的不断更新、计算能力的不断提高以及对运算速度的要求，传统的散列算法MD5，SHA已日益显示出它们的缺点和不足，并且过去hash函数的构造多是基于分组密码算法DES的，而hash函数的安全性是建立在分组函数的安全性之上的，由于DES运算量很大、运算速度很慢以及其本身的一些特性，因此基于DES算法的散列函数具有潜在的不安全性。

Along with the password attack method unceasing renewal,the computation ability unceasing enhancement as well as to theoperating speed request, the tradition disperses row algorithm MD5,SHA has demonstrated their shortcoming and the insufficiency day byday, and thestructure of hash function is mostly based on block cipheralgorithm DES, but the HASH function security is established above the grouping function security,because the DES operand is very big, the operating speed veryslowly by and its itself some characteristics, thereforedisperses a row function based on the DES algorithm to havepotential unsecurity.

摘要随着密码攻击手段的不断更新、计算能力的不断提高以及对运算速度的要求，传统的散列算法MD5，SHA已日益显示出它们的缺点和不足，并且过去hash函数的构造多是基于分组密码算法DES的，而hash函数的安全性是建立在分组函数的安全性之上的，由于DES运算量很大、运算速度很慢以及其本身的一些特性，因此基于DES算法的散列函数具有潜在的不安全性。

If a class cmp method it should not dene a hash operation either; if it denes does not dene a cmp or eq but not hash, its instances will not be usable as dictionary keys.

如果类没有定义 cmp方法，它也不应该定义 hash操作；如果类定义了 cmp或 eq但没有 hash，它的实例就不能作为散列表的键使用。

These two structures can decrease the adding new failure probability to neglectful level while hold the advantages of easy of implementation and lower system cost.(3) With the analysis of several kinds of high volume hardware hash table, a DRAM based multi-level hash table structure is proposed.

3分析了几种大容量硬件哈希表实现结构，提出了一种基于DRAM的多级硬件哈希表结构，并对其静态查表性能和动态查表性能进行了深入研究，具有一定的理论和实用价值。

The secret key operates on the message hash generated by SHA-1; to verify a signature, one recomputes the hash of the message, uses the public key to decrypt the signature and then compares the results.

密钥运行在由SHA-1产生的消息哈希；为了验证一个签名，要重新计算消息的哈希，使用公钥解密签名然后比较结果。

For some kinds of hash tables, performance may degrade catastrophically when the table becomes too full, so the programmer needs to have a fairly accurate idea of how many data items will need to be stored (or be prepared to periodically transfer data to a larger hash table, a timeconsuming process).

某些哈希表被填满时，性能下降的非常严重，所以程序员必须要清楚表中将要存储多少数据（或者准备好定期地把数据转移到更大的哈希表中，这是个费时的过程

I can do simple painting, carpentry and plumbing.

我能做简单的油漆、木工和修水管等工作。

The motivations, notations and outline of this work are also given in this chapter.

从这个意义上讲，这些时滞是无害的。然后用实例说明这三个定理的应用和互不包含性。