Reading assignment: Hashing

Blockchain and Bitcoin 101
#3093
  1. The hashing algorithm used by BTC is called SHA-256
  2. The transactions/ formulae are complete irreversible.
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#3094
  1. SHA-256
  2. I think it hard to brute-force because of few things. One of them is that " Every such algorithm has distinct features, including the important feature that each one produces unique hashes. Furthermore, these algorithms can only be solved to find the ultimate hash output, they can not be reversed to calculate the initial raw data." So that one of the reasons.
    That means even if you would try to brute-force or even copy the algorithm we should not forget that computers are working under consensus idea. So then the whole network should verify the damage, which would not happen due to the consensus mechanism.
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#3095
  1. SHA-256
  2. Because it need vey big amount of computing force
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#3096
  1. SHA-256
  2. Brute force is a process of elimination and due to the shear number of computational possibilities it would take far too long to complete. Formulas are also unidirectional thus cannot be reversed.
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#3097

1). SHA256
2). Because the hash has to be less than the target

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#3098

** What is the hashing algorithm called used in Bitcoin?**
Sha-256

** Why is this hashing algorithm really hard (almost impossible) to brute-force?**
You must have 51% of the hashing power to create a “51%” attack. If using this method the energy and price for electricity, even in china, would not truoly be worth the reward and attack in $$$$. The Time, Effort, and Cost is way to enormous.

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#3099

Thx a lot 4 your answer. Maybe ill get a better idea further in course - based on article it was strange :wink:

#3100

1- The Bitcoin hash algorithm is called SHA-256.

2-It’s almost imposible to force it because every hash has his code, if you change a minimum character you will change de hash. It is only solved unidirectional.

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#3101

Thank you very much for this clarification. I am learning so I appreciate the distinctions:-)

#3102

Hash functions in itself have nothing to do with mining. Mining utilizes hash functions in the PoW process. The reason why hash functions are hard to brute force is because of the sheer number of possible outputs. :slight_smile:

#3103

  1. (SHA) SHA-256

  2. The odds of breaking the security of this hashing algorithm, SHA 256 via brute force are virtualy impossible as it would take extremly long time to discover the outcome, and even then they would then have no clue as to work out the relation to the income.

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#3104
  1. Bitcoin uses the SHA (Secure Hashing Algorithm) hashing algorithm
  2. It’s hard (almost impossible) to brute-force, because the only way to get to the right answer, is to perform a series of complicated calculations, that don’t have any known short-cuts
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#3105
  1. What is the hashing algorithm called used in Bitcoin?
  • Secure Hash Algorithm, also known as “SHA-256”
  1. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    -SHA-256 algorithm algorithms can only be solved to find the hash output, they can’t be reversed to calculate the initial raw data. a Bitcoin hash is only solved in a linear, unidirectional manner
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#3106

  • What is the hashing algorithm called used in Bitcoin?
    SHA256

  • Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Because there are 2^256 possibilities…a ridiculously large number that is unimaginable in our minds. The function can’t be reversed so performing a trial and error would take some time.

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#3107

:small_orange_diamond:1. What is the hashing algorithm called used in Bitcoin?
Secure Hash Algorithm (SHA) named SHA-256

:small_orange_diamond:2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
Because it is only solved in a linear unidirectional manner. The algorithm can only be solved to find ultimate hash output but can’t be reversed to calculate the initial raw data. This one-way mechanism is guaranteed through mathematical equations. Is it 100% impossible? No this is something that quantum computing can help with but we are years away from that and by then our technology would have hopefully evolved to combat that issue.

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#3108

What is the hashing algorithm called used in Bitcoin?

SHA-256

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

the algorithms can only be used to solve the ultimate hash output. They cannot be reversed to find the initial data input

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#3109
  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 SHA-256 Algorithm can only be solved to find the output and not reversed engineered to find the input. It is a one-way algorithm. You cannot force it to do anything you can only attempt to solve it through very level software and hardware.
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#3110

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

  2. Brute-force is nearly impossible in this hashing algorithm, because it has way too many alphanumeric possibilities and the algorithm cannot be reversed to find the inputed data. The chances of someone guessing an address is extremely unlikely.

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#3111
  1. Secure Hash Algorithm, referred to as SHA-256
  2. A BTC hash is only solved in a linear, unidirectional manner and does not allow the reversal of a hash. You cannot go from output to input
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#3112
  1. SHA 256
  2. The number of computational possibilities is very high with a 256 hash, it’s impossible to find the input based on the output.
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