Apr 5, 2016 · Typically it is correct to say that the output of a hash function is a hash (aslo known as a hash value or a hash sum). However, sometimes people refer to the function itself as a …

The main difference between hash functions and pseudorandom number generators is that a hash function gives a unique value for each input. This is important for applications such as …

This answer possibly explains why choosing M(table size) equal to a power of 2 should be avoided.. Prime numbers that are too close to a power of 2 will provide the same kind of …

Mar 17, 2021 · Given an open-address hash table with $\alpha$ < 1, the expected number of probes in a successful search is at most $\frac{1}{\alpha}\ln\frac{1}{1-\alpha}$ I read this in a …

hash值是通过一个计算函数把难以比较的字符串或者其他类型的数据映射成一个整数，最常用的就是映射a～z的hash值，变成hash[(str(i)-‘a’]这个数是一个十进制数，这个十进制数把它映射到0 …

Nov 14, 2023 · As far as I and this wikipedia page know, there are no collisions (2 inputs with the same output) found in SHA-256 (yet). what would happen if a collision were to be found, 1. …

In particular, if you're going to need the order on the keys, for example if you want to be able to list the keys in alphabetical order, then hash tables are no help (you'll need to sort them), whereas …

Feb 11, 2022 · Thus, no matter what I do, with 256-bits hash functions I cannot reduce the probability even below 99%! What can I do? Is the Bloom filter useless in my case? I was …

I am trying to implement a hash table for string keys as part of a university project. I was able to make a basic, working implementation without major issues. I am now trying to optimize the …

Jul 26, 2023 · Hash algorithms are designed to produce a practically random output, so for a 24-byte (192-bit) hash, you'd need on the order of $ 2^{96} $ or $ 10^{30} $ inputs to have an …