Reading assignment: Hashing

Blockchain and Bitcoin 101
#3875

  1. SHA-256

  2. Because it is a oneway algorithm. That means you cannot reverse compute the input from the output. The only chance to get the original input is guessing it and it is therefore very unlikely brute-force.

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#3876

  1. Secure Hash Algorithm - SHA 256

  2. one-way mechanism. It means that with the output it’s not possible to recreate the input where it came from.

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#3877

SHA 256

Because it’s one directional where you can not go back and use to output to reveal the input. There are too many possibilities ro brute force

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#3878

  1. SHA-256

  2. The hashing algorithm is unidirectional, along with having 0-256 possible hash value. Hence the number of possible inputs to go over, aka brute force, is arduous and impractical

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#3879

What is the hashing algorithm called used in Bitcoin?

SHA-256

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

Because between the number 0 and a number that has 256 digits, the number of possibilities is too high to be able to brute-force it

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#3880

1- Secure Hash Algorithm (SHA) named SHA-256
2- The practical reason the algorithm is really hard ( almost impossible ) to brute - force is because there is a specified hash rate for each block to be mined to maintain a specific and predictable supply of Bitcoin.

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#3881

What is the hashing algorithm called used in Bitcoin?

SHA-256 Secure Hash Algorithm (SHA)

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

SHA 256 uses an algorithm that is uni directional. It is a one-way mechanism which through the use of mathematical equations do not allow for the reversal of a new hash and is therefore almost impossible to brute-force.

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#3882

the algorithm is called sha-256 its almost impossible to hack because it is unidirectional the hash can only be solved in a linear manner and is not able to be reversed

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#3883

SHA-256

It is impossible to reverse the output to reassemble the input.

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#3884

sha 256

it’s a one- directional algorithm, and it’s impossible to reverse engineer

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#3885
  1. SHA-256
    2.Hash is impossible to brute force because Bitcoins hash rate is only solve in linear equation and in result the output cannot be reversed to calculate the initial input
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#3886

  1. SHA-256

  2. There are too many computational possibilities, the linear building makes transactions irreversible, process scrambles data but keeps the information.

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#3887
  1. SHA-256
  2. Non reversible. Very difficult to guess the same input.
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#3888

What is the hashing algorithm called used in Bitcoin?
SH-256 is the name of the algorithm

Why is this hashing algorithm really hard (almost impossible) to brute-force?
It is hard to brute-force because of how many combinations are available and it makes new outputs each time an input is entered between 0 to 256 characters long

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#3889

  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 output can be from 0 to 256 characters long, and it changes every time a new character is written.

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#3890

What is the hashing algorithm called used in Bitcoin?

SHA-256 (SHA = Secure Hash Algorithm)

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

Each algorithm has distinct features, it is a one-way-function, each one produces unique hashes which can not be reversed. Furthermore the SHA-256 means the target is a 256-bit alphanumeric code which all Bitcoin clients share. Each hash provides a random number between 0 and 256. The lower the value the harder it is to generate a new block. So it is like winning a lottery. Varying a block’s header is a trial and error process with statistically very low chances of success.

In addition, to use brute force one would need so much computational power that it is uneconomical.

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#3891
  1. SHA 256
  2. Because of the numerous possibilities of the calculation
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#3892

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?
-There are too many computational possibilities and it would require too much power and time.

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#3893

  1. SHA-256

  2. It is irreversable, meaning it is a guess-game. A block’s header must be hashed to a specific target. In order to win the block the hash must be equal or under this target, which is known by all miners. So mining is a time sensitive guessing-game, as all miners compete against eachother. To win, you need more computational power than your competitors.

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#3894
  1. What is the hashing algorithm called used in Bitcoin?

Secure Hash Algorithm (SHA) named SHA-256.

  1. Why is this hashing algorithm really hard (almost impossible) to brute-force? There are far too many possibilities for what the hash function could be. With increasingly lower targets, it is impossible to brute force through this algorithm.
1 Like