...函数是一种单项密码体制,它是一个从明文到密文的不可逆函数,也就是说,是无法解密的。通常应用在只需要加密、不需要解密的特殊应用场合。单项散列(Hash)函数H(M)作用于一任意长度的消息M,它返回一固定长度的散列值h:h=H(M)作为初始消息的独一无二的“数字指纹”,从而能保证数据的完...
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In the scheme,the updated polynomial’s coefficients were generated by a one-way hash chain,which can save the computation costs of generating a random polynomial.
该方案使用单向散列链构造更新多项式,避免了生成随机多项式带来的计算开销。
参考来源 - 基于单向散列链的可更新(t·2,447,543篇论文数据,部分数据来源于NoteExpress
Because if you did what I suggested with the list, the time to look up the key would be linear in the length of the list. You'd have to look at each element until you found the key.
字典是用一种很神奇的,叫做散列法的算法,来实现的,后面我们将,会学到一点关于。
Dictionaries are implemented using a magic technique called hashing, which we'll look at a little bit later in the term, which allows us to retrieve keys in constant time.
散列法的内容,此方法可以让我们在线性,时间内检索到键,因此字典的大小并不重要了。
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