Reading assignment: Hashing

Blockchain and Bitcoin 101
#2973

What is the hashing algorithm called used in Bitcoin?
Bitcoin uses a Secure Hash Algorithm named SHA-256, which I just learned was developed by the NSA.

Why is this hashing algorithm really hard (almost impossible) to brute-force?
A Bitcoin hash is only solved in a linear, unidirectional way so there is no way to reverse it to find the original inputs.

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#2974

Secure Hash Algorithm (SHA) SHA-256

SHA-256 is almost impossible to brute force because of the sheer number of potential inputs that could return the desired output. Given that hash functions are deterministic, that means there are 2^256 different possible inputs to hash and compare to brute force the algorithm.

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#2975
  1. What is the hashing algorithm called used in Bitcoin?

SHA-256

  1. Why is this hashing algorithm really hard (almost impossible) to brute-force?

It is a one-way mechanism that is guaranteed through intricate mathematical equations which do not allow the reversal of a new hash. Therefore, a Bitcoin hash is only solved in a linear, unidirectional manner.

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#2976
  1. What is the hashing algorithm called used in Bitcoin?

SHA-256

  1. Why is this hashing algorithm really hard (almost impossible) to brute-force?

One way path, complex math equations, and you cannot reverse engineer the hash.

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#2977

  1. SHA 256

  2. Impossible with the amount of computational possibilities and would take a lot of time.

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#2978
  1. Secure Hash Algorithm - 256
  2. The reason why hash functions are difficult to brute force is because of the sheer number of possible outputs.
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#2979

1. What is the hashing algorithm called used in Bitcoin?
SHA-256 is the hashing algorithm used in Bitcoin

2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
Since this is a one-way mechanism, it is really hard to reverse the hash function and to find the input based on the output.

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#2980

  1. The hashing algorithm is called SHA-256 Secure hash algorithm made by the NSA

  2. It is impossible to retrieve the data of the inputs of a hash if you only have the outputs as these functions only work in one direction.

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#2981

  1. SHA-256

  2. To make it impossible to reverse engineer.

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#2982
  1. SHA-256
  2. A hash is a cryptographic result of a hash algorithm. It is one directional & cannot be reversed. It’s also nearly impossible to figure out the original input data from the hash.
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#2983

  1. SHA-256

  2. It is almost impossible because the computational power required is almost un-existent. Since all blocks are connected in a linear way, a disruptance in a single block is impossible, all blocks are connected in the blockchain. :fast_forward: :fast_forward: :fast_forward: :fast_forward:

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#2984

  1. Secure Hashing Algorithm-SHA 256.

  2. Because the Bitcoin hash is only solved in a linear, unidirectional fashion that cannot be reverse engineered. The SHA-256 algorithm produces a large number of outcomes. Each miner produces a guess in the form of a hash. If this does not fall below the target value, the block header is altered, and the different hash produced and compared to the target value once again.

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#2985

sha 256 - Secure Hash Algorithm

It cannot be reverse hashed

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#2986
  1. Secure Hash Algorithm 256: SHA-256
  2. Hash algorithms are designed to be unidirectional. The result is one of an amount of possibilities so big, thatnot even brute force could take a reasonable time to solve.
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#2987

  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?

Hashing algorithm has distinct features and the most important one is that each of these algorithms produces unique hashes. This algorithms can only be solved to find out the output, but they cannot be reversed to calculate the initial data.

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#2988
  1. SHA 256
  2. because of the amount of combinations possible and cant be reverse hashed
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#2989

1.) SHA - 256

2.) if even one letter or symbol is wrong the output hash will be 100% different.

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#2990

  1. The hash algorithm is called SHA-256

  2. the BTC Hash is hard to break as it works in a unidirectional way only. You cannot go back, only forward.

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#2991

  1. SHA-256 (Secure Hash Algorithm - 256bit).

  2. SHA-256 is not reversible. Hash functions are used as a one-way method so once the has function gives an output it’s almost impossible to go back to the input.

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#2992
  1. SHA-256
  2. It’s nearly impossible to reverse since the output of a hash function is highly reliant on the input. Even one slight change to the input will give a wildly different output. Compounding on this, the number of possible outputs(given a sufficient number of possible inputs) is often so astronomically high, that the likelihood of guessing with a brute force approach is less than a billionth of a percent.
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