What is a Hash | What County

What is a Hash

The hash function is a fundamental component of cryptocurrencies such as Bitcoin. However, the hash function existed well before the advent of Bitcoin. It is an element of cryptography and is used to specify arbitrarily large data sets in a fixed length.

What is a Hash
What is a Hash
Hash
Hash

What is a hash?
A hash is the result of a mathematical hash function that transforms an arbitrary amount of data into a fixed character length.

There are many different hash functions, all of which have different properties. The hash function used in Bitcoin is the SHA-256. SHA stands for Secure Hash Algorithm. The specialty of the function is to ensure safety.

A hash is a type of algorithm that calculates a short value or fixed-length text from a long data text (string) of any length. The mapping function should be calculated efficiently. Conversely, however, the original text may not be reproduced from the calculated value.

Applications

Hashes are used in two different ways. In cryptography, they are used as a message digest and digital signature. Hash values are formed from the text and a key. These can be used to prove the integrity of a text, since a change in the text results in a different hash value, which can only be formed if you have the right key. Known cryptographic hash algorithms are MD4, MD5, SHA-1 and TIGER. This is also used to save passwords unreadable for the administrator. Instead of storing the password in plain text, only the hash value of the password is stored and compared with the hash value of the password of a later input. In order for these procedures to continue to be safe, they must be combined with salts or key stretching today and applied several times.

What is a hash in simple terms?
What does a hash do?
What is an example of a hash?
What is a hash in cyber security?

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