Reading assignment: Hashing

Blockchain and Bitcoin 101
#1570

Yes, you are correct! :stuck_out_tongue:

1 Like
#1571

Hi @lbwj :slight_smile: you answered your homework question in the wrong thread :stuck_out_tongue: its fine though and you are correct :slight_smile:

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#1572

1.-sha-256
2.- The amount of possibilities is so huge that it would take too much time to bruteforce it. (2^256 possibilities)

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#1573
  1. SHA 256
  2. Due a huge amount of unsuccesful attempts
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#1574
  1. SHA-256
  2. The total number of possibilities is so large that it is unlikely two people get the same result in their life time. At the moment maybe later.
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#1575

Sorry, my bad for the scramble:) I had posted the answer before completing the last question!

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#1576

  1. SHA-256

  2. SHA-256 is solvable with O(1), so the maximum number of attempts it could take to brute force the inverse of a particular hash is 2^256 - 1, with the average number of attempts being 2^(256/2) - 1. It would take too long for the hashing algorithm to be brute-force solved, which results in the high difficulty of the puzzle.

1 Like
#1577
  1. What is the hashing algorithm called used in bitcoin?

SHA-256 (Secure Hashing Algorithm 256)

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

It is nearly impossible to obtain the input data from the output. You would need to test all possible inputs (approx 2^256 tries) to see if they match the output. The computation is so large that this is very unlikely to be obtained.

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#1578
  1. SHA-256
    2Because it is very difficult to find 2 inputs to produce same out
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#1579
  1. What is the hashing algorithm called used in Bitcoin?

Answer: SHA256

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

Answer: It would require many life times of picking up a random input, hash it and then compare the output and repeat until you find a match.
And even if you would be able to hack it I would be already be to late.

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#1580
  1. SHA-256
  2. 2^256 has 1.1579209e+77 possibilities. It would take too much time and energy to brute force this.
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#1581

  1. SHA 256

  2. Hashing can be described as solving a puzzle, given that there are only 21m bitcoin ever to be mined as it becomes more scarce the solving of these puzzles become harder to complete. Given that mining now is getting so hard to compute these equations more powerful, faster equipment is required allowing these puzzles to be solved with brute force to complete the addition of blocks onto the chain and slow down the distribution of blocks onto the chain…

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#1582
  1. The hashing algorithm used in Bitcoin is called SHA-256
  2. The hashing algorithm is difficult to brute-force, because the data set is so extensive, worst case scenario it is the last value checked, best case first. However the average is in the middle, which is still an extremely long time to find.
2 Likes
#1583

  1. The Bitcoin hashig algorithm is called SHA-256

  2. SHA-256 is almost impossible to brute force because of the endless number of inputs you have to hash and compare to the output.

2 Likes
#1584
  1. SHA-256
  2. Computationally intensive, taking an impractical amount of time to crack.
3 Likes
#1585
  1. sha-256
  2. because it takes on average 2^255 guesses which is a really long time
3 Likes
#1586
  1. The hashing algorithm used in Bitcoin is SHA-256
  2. This hashing algorithm is almost impossible to hack because it will take a lot of effort to find a collision. And even if the person successfully finds one, the tiniest change can be noticed by the whole system.
2 Likes
#1587
  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?
    It is very complex and it is impossible to guess the input with only the hash code.
    you will need to guess it and it will take a very very long time.
2 Likes
#1588

  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?
    Well actually it is possible to brute-force SHA 256, but it would take way too long which makes it negligible

2 Likes
#1589

  1. SHA-256 (Secure Hashing Algorithm 256).

  2. Because it would take so long, that it’s not something that needs to be factored in and considered, it’s infeasable.

1 Like