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SHA256
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because it is very long, and the slightest deviation from perfection will win you nothing.
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You complicated the answer a bit, but seems ok. 
you could just say difficult to brute force due to the sheer number of possible outputs 
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- Bitcoin uses SHA-256.
- Itâs hard to brute-force this hashing algorithm because there are 2^128 -1 possibilities to try.
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- Secure Hashing Algorithm 256 (SHA-256)
- Because there are an enormous amount of output possibilities (2^256-1 to be exact)
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- The hashing algorithm used in bitcoin is the SHA-256
2)The hashing algorithm SHA-256 is almost impossible to brute-force because it meets all 6 of the required properties (deterministic, quick computation, pre-image resistance, small changes in the input changes the hash, collision-resistant, puzzle friendly) to be considered a secure cryptographic hash function. The other major factor is known as high min-entropy meaning the variable of numbers is so big that a bruteforce attack would probably take more than your lifetime with single computing power.
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- SHA-256
- The algorithm renders the number of possibilities as much too large.
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1)sha-256
2)it would take more than several lifetimes to guess correctly the input of the hashed data
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SHA-256 or Secure Hashing Algorithm 256.
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The total number of possibilities is so large its unlikely to get a match in our lifetimes.
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- What is the hashing algorithm called used in Bitcoin?
SHA-256 - Why is this hashing algorithm really hard (almost impossible) to brute-force?
Because you have some many options to compare output to input hash that it takes many generations to crack.
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1. What is the hashing algorithm called used in Bitcoin?
SHA-256
2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
There are like 2^256 - 1 possibilities which would take a lot of computation power and several lifetimes to get a match.
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The hashing algorithm used on the bitcoin Blockchain is called SHA-256, which means Secure Hashing Algorithm 256
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The hashing algorithm is really hard to brute force it because it has 2^256 possibilities of matching the output to the targeted input.
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Because SHA 256 has 2^256 has different possibilities.
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Thank you for the clarification
- What is the hashing algorithm called used in Bitcoin?
It´s called Sha 256 - Why is this hashing algorithm really hard (almost impossible) to brute-force?
The possibility to gues is almost endless (lifetime consuming) so it doesn´t make sense to even try. Maybe quantum supercomputers might change that in the future?
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What is the hashing algorithm called used in Bitcoin?
(SHA-256) Secure Hashing Algorithm 256-bit -
Why is this hashing algorithm really hard (almost impossible) to brute-force?
It takes so long to get the correct output, that it doesnât make sense to try to crack the code in the first place. Worst Case: 2^256 - 1 Times.
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SHA-256
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A nonce that is generated is so long and completely random that it would take too long to get the same answer. The chances are astronomical.
Edit: 2. It would be near impossible to guess a blockhash that is lower than that of the random nonce that has been generated and every time it fails it generates a new nonce making it almost impossible to brute-force.
A nonce is just a random number, and can even be a couple digits. If you mine a block, you just need to make sure that the entire blockhash is starting with a bunch of leading zeroâs. Because hashes are so unpredictable, you need to keep guessing a random number until the blockhash is finally lower than the the target hash.
Try playing on https://andersbrownworth.com/blockchain/blockchain
Here the difficulty is not that high, so you need only 4 leading zeroâs.
In this question we mean that it is hard to brute force a Sha 256 hash. You need to keep guessing the input and hash it to compare if it matches the hash you wanted to brute force. Brute forcing is like guessing a pincode and trying every posssibe combination until you find the correct code. Sha 256 has an output of 2^256 possible outcomes, wich is basically so big that it is not worth the time and energy to brute force a Sha 256 hash.
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1. What is the hashing algorithm called used in Bitcoin?
SHA-256 (Secure Hashing Algorithm 256)
2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
The only method to find out the original input is the brute-force method, meaning, that you have to randomly pick up an input to see if it gives you the same output and find the match. Since this would probably take too much time, it just doesnât matter. Already a small change in the input changes the output completly. (2^256 possibilities)
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1.) The algorithm used in Bitcoin is SHA 256.
2.) Because if you were to pick up a random input, hash it, then try to compare & match it to the output, it would take too long & it would then not matter.
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Sha 256
The chances of two people receiving the same is nearly impossible. Everyone had the same hash number of 256 digits, but 1 small change on the data input make a large change on the result of the hash
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