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Show Bitcoin hash: Step by step
The world of cryptography and computing is full of complex concepts, but one of the topics stands out because of simplicity: hash algorithms. Specifically, we explore the SHA-256 hash algorithm used by Bitcoin, a decentralized digital currency that allows users to create, control and manage transactions without central authorities or mediators needed.
The funds
Hashing is a mathematical function that takes the input data (a so -called “message”) and creates a fixed size output called “hash”. For the SHA-256, which stands for safe hash algorithm 256, this hash is usually 256 bits long. The aim of Hashing is to ensure the integrity and credibility of data, so it is an essential element of digital transactions.
How Bitcoin Use Extract
According to official Bitcoin Wiki, Bitcoin uses the SHA-256 algorithm to generate justifiable random numbers by requireing a predictable amount of CPU effort. This means that although you have access to efficient computers, it is not necessary to execute bitcoin transactions.
To understand how it works, we break down the process step by step:
- Create a message : The user creates a message that is any data such as transaction or information.
- HASH Calculation
: The message is given to a cryptographic hash function (in this case Sha-256). This process includes multiple iterations of the rules and calculations of the hash algorithm.
- Output generation : The output of the hash calculation is created, which can be fixed in size.
Why Sha-256?
The election of the SHA-256 was probably created as a subtraction algorithm of Bitcoin:
- Cryptographic Power : SHA-256 is considered a safe and widely accepted cryptographic standard.
- The collision resistance : The likelihood of creating two different input strings to produce the same output extract is extremely low, ensuring the integrity and authenticity of the data.
- Preimage Resistance : It is virtually impossible for an attacker to find a particular input string that results in a certain output extract.
Display Sha-256
To present the operation of Sha-256, create a simple example:
Imagine you have two information: “Hello, world!” and the hexadecimal code “1234567890ABCDEF”. For each information, you follow these steps to produce Sha-256 Hash:
- Input : Convert both strings to hexadecimal format (for example, 48656c6c6f20576f726c6421 to “Hello, World!” And “1234567890ABCDEF” hexadecimal).
- HASH Calculation : Use a cryptographic hash function, such as the SHA-256, to produce a fixed size output string.
- Output : The resulting hash strings are of similar lengths (usually 256 bits long).
Conclusion
The Sha-256 hash algorithm used by bitcoin is an essential element to ensure the integrity and credibility of digital transactions. If you understand how it works, you can evaluate the complexity and safety of this cryptographic standard.
Regardless of being an experienced cryptographer, or just curious about the internal functioning of cryptocurrencies, the exploration of the world of hash algorithms, such as the Sha-256, can be impressive and enlightened.
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