# Algorithme hash searching

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## Frequently Asked Questions

**What is a hash algorithm?**

Hash algorithms have been around for decades and are used for applications such as table lookups. For example, you can use a person’s name and address as a hash key used by a hash algorithm.

**What is the SHA-1 hashing algorithm?**

SHA-1 is one of the main algorithms that began to replace MD5, after vulnerabilities were found. SHA-1 gained widespread use and acceptance. SHA-1 was actually designated as a FIPS 140 compliant hashing algorithm.

**What is a one-way hash algorithm?**

A one-way hash is an algorithm that transforms a string into another string in such a way that the original string cannot be calculated by operations on the hash value (hence the term “one-way” hash). Popular one-way hash algorithms are MD5 and Standard Hash Algorithm.

**What is Zobrist hashing algorithm?**

This algorithm has proven to be very fast and of high quality for hashing purposes (especially hashing of integer-number keys). Zobrist hashing was originally introduced as a means of compactly representing chess positions in computer game-playing programs.