Reading assignment: Hashing

Blockchain and Bitcoin 101
#1347
  1. sha - 256
  2. You have to be lucky and have a toooon of time.
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#1348
  1. SHA-256
  2. It would take so long to go through all the possible inputs to match the hash output. It would take generations to match the correct input and output!
2 Likes
#1349
  1. The hashing algorithm used in Bitcoin is called SHA-256.
  2. The hashing algorithm is extremely hard to break with brute force because there are simply so many possibilities that the key could be. Guessing takes too long.
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#1350

1: SHA-256

2: The SHA256 hashing algorithm is almost impossible to brute force because it is essentially a one-way computation where the input canā€™t be found from the output. With current computational power this is not a realistic possibility.

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#1351

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

Why is this hashing algorithm really hard (almost impossible) to brute-force?
Brute-forse means that you to take a random output, hash this output and hope you will have the right code. This is a totale random proces. The attemps you have to make before you have the right hashcode are that high that it is seen as impossible

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#1352

(1) The Bitcoin hashing algorithm is called SHA-256.

(2) This hashing algorithm is really hard/impossible to brute-force attack because there is a unique output for each input and you cannot determine what the input was (ā€œpre-imageā€ in the article) simply by having the output data.
You/a computer would need to guess each input value through the function to see if you get the same output.
When you deal with large enough numbers this process becomes very long and time consuming. It is technically possible to brute force guess the input for a given output, but it could take generations.

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#1353 
1. sha256
   
2. The sha256 hashing algorithm would require an impossibly large number of guesses to discover the source string that gave rise to the hash
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#1354

  1. The hashing algorithm used in bitcoin is: SHA-256

  2. This algorithm is almost impossible to brute force because of the high number of possible hashes for each input.

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#1355
  1. SHA 256 is the hashing algorithm.
  2. It is hard to brute force because the numbers of possibilities are huge. It is very unlikely that two people will get the same result
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#1356
  1. What is the hashing algorithm called used in Bitcoin?

SHA-256

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

2^256 is an astronomical number, I donā€™t even know whatā€™s it called. It would take ages to compare every hash output.

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#1357

Answer the questions below.

  1. What is the hashing algorithm called used in Bitcoin?
    It is called Secure Hashing Algorithm 256- SHA 256

  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    The SHA256 is really impossible to brute force because you will be dealing with a large big data and thus guessing the input to compare with the output which you want to find.This can take forever and generation on generation to set out the unworthy task.

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#1358
  1. SHA-256
  2. Because of the number of possibilities available is too great
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#1359
  1. SHA 256
  2. Because one would be able to hack the blockchain and it would be mutable.
#1360
  1. What is the hashing algorithm called used in Bitcoin?
    Itā€™s SHA256. So the output will always have 256 bits/numbers.
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Because of the number of possibilities, unless of a miracle you would have to spend the rest of your life trying to find from the output what the input is (in view of the huge number of computations to be done)
1 Like
#1361
  1. sha-256
  2. there are so many possibilities for what the input could be to get the output, that it is almost impossible to do in a productive amount of time
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#1362
  1. SHA256
  2. It would take such a long time for brute force to take place that it would take several lifetimes to happen, therefore, irrelevant.
1 Like
#1363
  • What is the hashing algorithm called used in Bitcoin?
    SHA-256
  • Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Because the number of possible answers is very high 2^256 and the property Pre-Image Resistance
    What pre-image resistance states are that given H(A) it is infeasible to determine A, where A is the input and H(A) is the output hash.
1 Like
#1364

  1. SHA-256

  2. Because there are so many different possibilitiesā€¦ it would take too much time for someone to do so.

1 Like
#1365
  1. What is the hashing algorithm called used in Bitcoin?
    Itā€™s called SHA-256 (Secure Hashing Algorithm 256)
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    There are too much data to go through and it would be impossible to guess the correct output
1 Like
#1366
  1. Hashing Algorithm = SHA 256 Secure hashing Algorithm
  2. Because it has too many possibilities for brute-force, which will take like 2 Personsā€™s life time.
1 Like