Veröffentlicht: 30.01.2018

SHA 256

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What does SHA 256 mean?

The abbreviation SHA 256 is a function that forms the core of cryptocurrencies such as Bitcoin, Bitcoin Cash and Bytecoin. This hash function belongs to the group of SHA 2 functions. SHA is an abbreviation for Secure Hash Algorithm.

A hash function is a one-way function that converts strings of any length into strings of uniform length. This is used, among other things, to check the integrity of files.

Origins of the SHA 2 functions

The functions were commissioned by the US standardization authority NIST. In 1991, the US Department of Homeland Security NSA released the first version of a hash function. Since then, this hash function and its successors have become standard applications on the Internet.

SHA 256 and Bitcoin

The secure hash algorithm fulfills two essential functions for cryptocurrencies. The best-known cryptocurrency that uses this hash function is Bitcoin. First, the Bitcoin feature is used as a proof-of-work algorithm.

Proof-of-work refers to the complicated creation of easily verifiable files added to the blockchain. Those who provide computing power for this proof-of-work will be rewarded with coins in return. This work is commonly referred to as mining.

In addition to the terms described, this hash function plays a role in the creation of Bitcoin addresses; coins can be sent to a Bitcoin address, which consists of 25 to 35 characters.

When sending coins, the exact address must be specified. However, the risk of trying to find a different existing address by typing is extremely low.

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