Reading assignment: Hashing

Blockchain and Bitcoin 101
#403

  1. Secure Hashing Algorithm 256

  2. Because it would take far too long to gues the input to the Secure Hashing Algorithm 256 as it is such a huge number and your chances of guessing it are so small it does not matter.

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#404

1.Bitcoin uses SHA-256

  1. It is extremely hard to bruteforce a hashing algorithm it would take 10 * 3.92 * 10^56 minutes using all of the mining power of the entire bitcoin network.which is an infinite time.
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#405
  1. Sha256
  2. Hashing algotithms are transitioning a string to another one usually ensuring strings of certain lengths to have no hash collisions. After discovering such collision a 2 different strings might result to the same output leading to hash collisions and leading to actually cracking the algorithm.
#406
  1. SHA-256
  2. You have to pick a random input, hash it and then compare the output with the target hash and repeat until you find a match. But that takes so long that it’s not worth it.
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#407
  • What is the hashing algorithm called used in Bitcoin?
    Sha-256
  • Why is this hashing algorithm really hard (almost impossible) to brute-force?
    It would take too much time
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#408
  1. SHA 256.
  2. It will take so long time to brute-force it, so it doesn’t even matter. It is not feasible.
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#409
  1. SHA-256 is the hashing algorithm used in Bitcoin.
  2. It is almost impossible to brute-force because it would take way too long that it wouldn’t be worth it.
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#410

  1. SHA-256

  2. It’s so time consuming to try, it becomes negligible.

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#411

  1. SHA-256

  2. The algorithm is deterministic, puzzle friendly, and collision resistant

#412
  • SHA 256
  • Because the input produces a chain of characters, the more characters input the more characters for the output. only a one character difference would have such a big impact in the output, that it could potentially take several generations to find the correct answer.
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#413
  1. SHA-256
  2. The nonce is random and the difficulty level must be high.
#414
  1. sha-256
  2. There are just too many possible combinations of inputs to go through, so it would take too long to do, at least with current technology.
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#415

SHA-256

Any small change to the input will effect the output drastically , this property of hashing leads to one of the greatest qualities of the blockchain, its immutability.

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#416

No matter how many characters you use as input, you always have the same 256bit output. Hashes are written in hexadecimal. 4binary bits = 1 hexadecimal character. So Sha256 hashes are 64 digits long.

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#417

Here we mean brute forcing to guess the input. It takes to many tries to guess the input, hash it and check if the hash is the same.

#418
  1. SHA-256
  2. This hashing algorithm is almost impossible to brute force because it requires the person to the enter and hash the entire data set until they find the output that corresponds to what they are searching for. This is unfeasible due to time constraints but not impossible.
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#419

1.the hashing algorithm used in Bitcoin is called SHA 256.
2. this algorithm has a too high number of hashes so to go to the beginning would be too time consuming for a brute force event.

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#420
  1. SHA-256
  2. There are too many possibilities.
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#421

SHA 256
The Its to long and harder to do the input from the output

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#422

What is the algorithm called used in Bitcoin?

1 Bitcoin uses SHA-256 (Secure Hash Algorithm)

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

2 Because the number of possible variants that would need to be tried is ridiculously high.

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