Reading assignment: Hashing

Blockchain and Bitcoin 101
#1610
  • What is the hashing algorithm called used in Bitcoin? SHA 256
  • Why is this hashing algorithm really hard (almost impossible) to brute-force? Because you have to pick a random hash, run in through the input and see if it comes up with the correct answer. This is really hard using SHA 256 because it has a high min-entropy.
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#1611
  1. What is the hashing algorithm called used in Bitcoin?

SHA-256

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

No matter how big or small your input is, the output of this hash will always be 256 in length. A small change to the input can make a huge difference to the output, but it will still be 256 in length. To try and find a collision, to start to try and identify the input, you would need to go through 2^256 different possibilities, which is a huge number and means the time to do it is so long, it doesn’t matter.

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#1612

1 SHA-256
2. Because there is a astronomically huge number of inputs which would have to be hasehd to check if they result in the output.

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#1613

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

  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    The hashing algorithm is really hard to brute force because you would have to go through 1.7 X 10^38 attempts to have even a 50% chance of getting a matching output (which is a number much more than the number of grains of sands on all the beaches on planet Earth)!

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#1614
  1. What is the hashing algorithm called used in Bitcoin?
    256 SHA
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Not feasible to reverse the output to find the input, would take a lifetime.
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#1615
  1. Secure Hashing Algorithm 256 / SHA-256
  2. While it is possible to determine the input of a hash based on the output, this is only possible by guessing the input and running it through the algorithm and matching it. So if you have a very simple input (a single digit for example) its not too difficult, but as soon as the input you are trying to decipher is even moderately complex the difficulty goes way up. On average it would take 2^127 attempts to brute-force a match to a hash.
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#1616

  1. Bitcoin blockchain uses SHA-256 algorithm.

  2. Just because is quite infeasible to find input data using their output. Number of possible combinations are enormous, as time consuming.

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#1617
  1. Sha-256

2.Because the it take to much time if you try again, again, and again that it becomes in practice infeasable.

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#1618

  1. The “Hashing” algorithm is SHA256

  2. Til now the difficulty is so high no person or computer has been able to break the code, but they could try humanly random but would take many lifetimes to do so even if possible at that.

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#1619

1.SHA256
2. Hashing creates a long random number from a data input, and it is so long that guessing it it’d takes us 12,700,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 years to find it with a computer calculating all day long non-stop.

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#1620

1/ sha 256
2/ proof-of-work

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#1621

SHA-256

Odd will never be in favor of brute Force, computing power needed and time required to solve the puzzle will defeat the attempt itself.

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#1622
  1. SHA 256
  2. because there are zillions of combinations and testing one by one it will take several years to match the hash numbers
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#1623

Ans.1) SHA-256 (Secure Hashing Algorithm)-256
Ans.2) The hashing algorithm of SHA-256 is really hard to break. The data sets stored, that require testing and proving of the SHA-256 are enormous volumes of data. Although the “brute force” attack can break pre-image resistance, the method simply would take far to long for its computation, and that simply is just not feasible to perform.

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#1624
  1. What is the hashing algorithm called used in Bitcoin?

Hashing algorithm used in Bitcoin is SHA-256.

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

The number of computational possibilities is huge using a 256 algorithm, who makes brute forcing infeasible, or almost impossible.

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#1625

  1. SHA 256

  2. A single small change to the input will radically change the output.

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#1626

SHA-256

Because a 256-bit hashing algorithm would take 2^255 attempts to discover a collision. This is an astronomical number.

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#1627

  1. SHA-256 is the hashing algorithm.

  2. The time and effort requirred is vast making it almost impossible but certainly infeasible to compute the correct hashing algorithm.

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#1628
  1. The hashing algorithm used in Bitcoin is called SHA-256 (Secure Hashing Algorithm 256).
  2. This hashing algorithm is almost impossible to brute-force because by picking a randomly selected input string of any length, you would be passing it through the SHA-256 hashing algorithm and getting an output which is of a fixed length. Using this process would be infeasible in making a match because of the enormous possible calculations.
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#1629
  1. The hashing algorithm used in Bitcoin is called SHA-256 (Secure Hashing Algorithm 256).
  2. This hashing algorithm is almost impossible to brute-force because by picking a randomly selected input string of any length, you would be passing it through the SHA-256 hashing algorithm and getting an output which is of a fixed length. Using this process would be infeasible in making a match because of the enormous possible calculations.
1 Like