Reading assignment: Hashing

Blockchain and Bitcoin 101
#2993

  1. SHA-256

  2. Because there are 2^256 possible combinations

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#2994

  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?
    Hash functions are a linear process and are not reversible. Each input has a unique hash which is formed by a mathematical function that cannot be used to find the raw data. Due to the size of the blocks ever increasing and becoming more complicated (as more miners/mining enter the market) the probability of hacking gets more and more complicated. To the extent that no current computational power can brute-force.

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#2995
  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 the intricate math equations force a one-way mechanism to not allow the reversal of a new hash. This means you have to start with a unique input, hoping that the hash function produces the ultimate output.
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#2996

  1. secure hashing algorithm-256

  2. a hash function is a unidirectional linear mathematical equation. That contains 2^256 outcomes.

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#2997
  1. SHA-256 (Secure Hash Algorithm 256)
  2. Because of the exponential number of hash (output) to compare with every nonce (input).
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#2998
  1. SHA 256
  2. This really lengthy code that a hash output must reach (without surpassing) is randomized and only through trial and error again and again is it reached. It already takes so much computational power to do this the way it is designed…being able to brute force it seems like it would take something more powerful than we’ve even seen yet.
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#2999
  1. SHA-256
    2.The hashing algorithm adjusts every two weeks for the amount of miners. the more miners the harder it is to mine. The less, the easier it is to receive bitcoin.
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#3000
  1. SHA 256
  2. Because there are just to many different combinations 256 digit numbers and each hash is uniq. To break the hash you have to put all the numbers in the right order which is almost impossible to do.
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#3001
  1. What is the hashing algorithm called used in Bitcoin? SHA-356
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force? complexity of 2**256, only linear computation is possible
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#3002

  1. secure hash algorithm, specifically SHA-256

SHA-256 is not reversible, hash functions are one-way method. Raw data can not be claimed using the output.

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#3003

  • What is the hashing algorithm called used in Bitcoin?
    The hashing algorithm used in Bitocin is called SHA-256 (Secure Hash Algorithm)

  • Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Because this algorithms can only produce the hash output, they can not be reversed to calculate the initial data

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#3004

  1. Secure Hash Algorithm = SHA-256

  2. too many possibiliy to solve it

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#3005
  1. What is the hashing algorithm called used in Bitcoin?

Secure Hash algorithm SHA-256

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

The Hash function is non-reversible

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#3006

1- SHA-256
2- The number of possibilities is huge, so its almost impossible that 2 people have the same output

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#3007
  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 would require an absurd/unfeasible amount of computational power, as there are too many possible outputs for the SHA-256 (2^256, a number which is far too large to fathom). You can’t work backwards to find the input with this algorithm, so you’re stuck trying to guess at what is practically an infinite possibility of hashes.

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#3008

  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 is no way a person can determine the input by knowing the output.

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#3009
  1. SHA-256
  2. Well I like the blender analogy :slight_smile: so my answer is: it is so hard to brute-force it because you can not bring back fruits you just blended in the blender to it’s original form :wink:
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#3010

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

  2. It is impossible to brute force because its like a data food blender.

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#3011

Hashing in itself has nothing to do with mining. Miners utilize hash functions to provide PoW. The reason why hash functions are hard to brute force is because of the sheer number of possible outputs. :slight_smile:

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#3012

  1. What is the hashing algorithm called used in Bitcoin? - Bitcoin uses the Secure Hash Algorithm, SHA-256 ( to run it’s consensus mechanism ).

  2. Why is this hashing algorithm really hard (almost impossible) to brute-force? SHA-256 can only be solved to find the output, it cannot be solved in reverse.

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