Reading assignment: Hashing

Blockchain and Bitcoin 101
#4779

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

  • Why is this hashing algorithm really hard (almost impossible) to brute-force?
    The possibility of matching the large amount of data are virtually impossible.

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#4780
  1. The hashing algorithm used in Bitcoin is called the Secure Hash Algorithm, aka SHA-256.
  2. This hashing algorithm is virtually impossible to brute-force because the SHA-256 itself is unidirectional; it cannot be solved to find the initial input. And if such a feat would be attempted, the answer is expressed in 256 bit, meaning that the attacker would need attempt numerous combinations in order to arrive at the correct answer; but such an endeavor would be extremely expensive and tedious, stripping the efforts of any real net incentive for going against the blockchain system.
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#4781
  1. SHA-256 (secure hash algorithm)
  2. They cannot be reversed it is only solved in a linear, unidirectional manner.
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#4782
  1. What is the hashing algorithm called used in Bitcoin?
    Secure Hash Algorithm (SHA) named SHA-256.
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    This one-way mechanism 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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#4783
  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 it is hard to brute force the length of data and match the output to the input.
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#4784

1- Bitcoin using SHA 256 (Secure Hash Algorithm with 256 bit)
2- Hashing algorithm is one way codding, using function which is not allow to decode hash result. So miners need to guess input which was used to generate hash. The more miners come to compete the harder it is to guess right combination. Bitcoin blockchain can adjust its difficulty once per two weeks (every 2016 blocks) so 1 block can be added every 10 minutes.

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#4785
  1. What is the hashing algorithm called used in Bitcoin?
  • Bitcoin uses the SHA-256 hashing algorithm.
  1. Why is this hashing algorithm really hard (almost impossible) to brute-force?
  • Because it’s impossible to go from the output to the input.
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#4786

  • Reading assignment: Hashing Questions

    • What is the hashing algorithm called used in Bitcoin?

      • Bitcoin hash algorithm - uses Secure Hash Algorithm (SHA-256)

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

      • Lottery - multiple miners compete to create a successful verification of a hash, the more competition the harder it is to figure out and gain a reward
      • Mining requires a bunch of CPU capacity
      • The higher the hash rates the more cpu power is needed
      • Also (can’t be reversed to recalculate) example was a blender
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#4787
  1. SHA-256 Is the hashing algorithm.
  2. The number of possibilities are nearly endless with a 256 hash, making it very unlikely to occur.
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#4788
  1. Sha 256 Algorithm
  2. High possibilities that makes it very unlikely of 2 people getting the same result in their lifetime.
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#4789

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?

Because out of a see of almost infinite possibilities there is only 1 input that will result in the same hash output. Aside from the time, it would also cost an enormous amount of energy/resources to try to solve the hash.

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#4790

  1. The hashing algorithm used in Bitcoin is the SHA-256.

  2. Due to the size of the number of possibilities, no two people could likely recieve the same result.

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#4791

Sha 256

because there are so many computations it would be too difficult

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#4792

SHA256
It takes too long, it costs too much and the reward is not worth it.

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#4793
  1. SHA-256
  2. It was constructed that way for security and immutability. It’s so complex that it is impossible for someone to find the input of a function from the output.
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#4794
  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 algorithm is created through " intricate mathematical equations" and can only be solved not attacked in a linear, unidirectional manner.
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#4795

1 - The hashing algorithm is called SHA-256

2 - Because every 2016 blocks it automatically changes its difficulty level depending on how many miners are currently mining, keeping the average at 1 block every 10 minutes.

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#4796

1. What is the hashing algorithm called used in Bitcoin?
SHA256
2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
It’s because it’s irreversible (to this day) and to verify fake transactions you’d need 51% or more of the capacity of calculations used to mine Bitcoin.

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#4797

1.SHA256
2. Its a one way of cryptographic hash function that would be extremely difficult to break. We are told its not currently possible, it may be possible in the future with very powerful quantum computers but not at this time.

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#4798

1 - Sha256
2 - Because need much computer power to try solved

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