Reading assignment: Hashing

Blockchain and Bitcoin 101
#3494

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

It’s called SHA-256. SHA means ‘Secure Hash Algorithm’ and 256 makes reference to the size the alphanumerical string will have in bits.

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

It’s almost impossible because the algorithm output cannot be reversed to get the original information. The hash is only solved in a linear, unidirectional manner.

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#3495
  1. SHA-256
  2. As it is a one-way mechanism and these algorithms can not be solved without finding the ultimate hash output and can’t be reversed to calculate the initial raw data. It basically can’t be used as digital fingerprint of the original used data.
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#3496

  1. BTC Hash algo is called Sha-256

  2. Hard to brute force due to the unidirectional manner in which the equations must be solved and the number of variations make it near impossible to duplicate and does not allow for backward calculation.

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#3497
  1. The Bitcoin algorithm is called Secure Hash Algorithm or SHA -256
  2. It is difficult to brute force because of the randomness of the numbers and the vast amount of bitcoin and people mining at this point.
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#3498

  1. What is the hashing algorithm called used in Bitcoin?
    SHA-256. ‘Secure hashing algorithm’ is a deterministic algorithm that creates a 64 character string based upon a an input. Th algorithm will always create the same output if the input remains constant. The content is unreadable unless the user has the key.

  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    SHA-256 is an expensive computation. A brute-force attack would need to make 2256 attempts to generate the initial data. Even the slightest change completely changes the output string (Avalanche effect) so hackers have no idea whether they are getting close® to the truth. The output is always unique based upon the input (no collisions).

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#3499

1 SHA 256

2 Because the outcome of algorithm has so many possibilities (2^256)

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#3500

What is the hashing algorithm called used in Bitcoin?

It’s a SHA-256

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

Algorithm produces unique hashes. These algorithms can only be solved to find the ultimate hash output, they can not be reversed to calculate the initial raw data.

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#3501

  1. Secured Hash Algorithm 256

  2. Because is only a one way function and once outputted is almost impossible to recomput.

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#3502

1
Secure Hash Algorithm (SHA) named SHA-256

2
Algorithms can only be solved to find the ultimate hash output, they can not be reversed (brute forced) to calculate the initial raw data.

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#3503
  1. Secure Hash Algorithm or SHA-256
  2. Hash functions are one-way functions and SHA-256 has a 0 to 256 digit function and produces a different output with each input.
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#3504

  1. What is the hashing algorithm called used in Bitcoin? Secure Hash Algorithm (SHA)

  2. Why is this hashing algorithm really hard (almost impossible) to brute-force? Each hash produces a random number between zero and 256 digit value. A miner has to try many times to reach the target. The algorithm become more and more challenging to mine as more blocks are created. It is almost impossible to duplicate the process.

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#3505

SHA-256

Because there are far too many possibilities that would have to be tried.

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#3506

1: SHA 256
2: because the hash provides a random number output from 0 and 256 making it near impossible to create an input that is exactly as what was given by the hash.

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#3507
  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?

The resources required to brute-force a hash solution render the attempt near impossible. Miners only attempt a solution that meets a varing “close enough” solution.

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#3508

  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?
    Because there are so many possibilities, and each hash produced is unique and can not be reversed to figure the initial input data.

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#3509

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?
The hashing algorithm used in bitcoin no matter the input gives 256-bits lenght outputs. The computational power needed to recreate similar output would be beyond imaginable.

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#3510

The algorithm is named SHA - 256, Secure Hash Algorithm.

It is impossible to brute force because the algorithm solves input in a unidirectional manner. It is impossible to reverse the computation.

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#3511

Secure Hash Algorithm 256 (SHA256)

Because of the number of possible 256 hash function output.

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#3513
  1. What is the hashing algorithm called used in Bitcoin?
  • The most popular cryptocurrency in the world uses a Secure Hash Algorithm (SHA) named SHA-256.
    the currency uses the proof-of-work (PoW) function. This same function is used in a number of Altcoins and is based on the SHA-256 algorithm
  1. Why is this hashing algorithm really hard (almost impossible) to brute-force?
  • Because when we have hashing algorithm, we can’t reverse the whole process when we have input and output in the input we have 256 different numbers, and when they go to the output they are mixed so if we want to reverse it even if we change the slightest comma or space there the hash output will be completely different. No one so far guess this order and it is almost impossible. We can look at it like to guess the lottery in this algorithm when something is done and it goes from input to output you basically can’t reverse the same process.
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#3514

SHA-256

Due to the output being irreversible and so
so many computations being used to create the output, it is impossible to determine the initial input.

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