Reading assignment: Hashing

Blockchain and Bitcoin 101
#4217

  1. SHA-256

  2. One obvious reason is that it is simply a one way system where once you input a number that gets calculated and as a result produces a hash output, there is no way to reverse this back to the original data.

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#4218

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

  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Its almost impossible the possibilities are endless that it would take a long long long time.

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#4219

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?

Because the amount of data is huge; it would take too many computations, and therefore time, to find the hash-too daunting and very impractical to attempt.

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#4220
  1. Secured Hash Algorithm (SHA 256)
  2. SHA 256 algorithm makes it impossible to reconstruct the initial data from the hash value. A bruteforce attack would need to make 2^256 attempts to generate the initial data, while the best hash rate goes for 50 TH/s
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#4221
  1. SHA-256
  2. It is not necessarily impossible. Depending on the data, most bruteforcers work by taking a list of words and then hash them, and then compare them to the provided hash. This will be harder within the blockchain as the data is a lot more complicated than, say, an 8 digit password. A collision is unlikely but as computers get betterā€¦the blockchain might become outdated.
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#4222
  1. The hashing algorithm used in bitcoin is called SHA256

2.The hashing algorithm is almost impossible to brute force due to the various safety features in the protocol.
a) each input creates a calculated unique hash, if there are any changes in text a new hash will be created.
b) There is no reversal in the computation.
c) The miners are securing the network by employing A P.O.W protocol.

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#4223

  1. The hashing algorithm used in BTC is called SHA-256

  2. SHA-256 canā€™t be reversed since the hash is unique, the number of possibilities to bruteforce it is 2^256. It would take extremely long time and enormous computing power to solve.

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#4224
  1. SHA-256
  2. The algorithm scrambles the information in a way that prevents the original data from being understood. It acts like a blender. The data has the same information in the hash, but it is impossible to identify it. To identify the hash, it also takes a LOT of computing power.
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#4225

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

The Bitcoin Hash Algorithm is called SHA-256.

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

Too many possibilities

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#4226

A1. Hashing algorithm used in Bitcoin is a kind of universal translator for computers. It is a string of alphanumeric codes composed of digits, letters or even larger media files and calculated using SHA-256 Secure Hash Algorithm. Bitcoin hash is created by solving mathematical equations and its miner is rewarded a Bitcoin for the proof-of-work (PoW).
A2. As the hasing algorithm is solved by a trial and error process using high power computers, it is very hard (almost impossible) to brute-hard. Hashing is continued until the blockā€™s header is equal to or less than the target, which is a ramdom number between zero and a maximum 256 digit value.

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#4227
  1. SHA 256
  2. The algorithm is designed in a way that you can not reverse the computation once it occurred. Bitcoin hash is only solved in a linear manner.
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#4228

Sha 256

Because it is an encrypted alpha-numeric outcome itā€™s impossible to reverse the outcome

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#4229
  1. What is the hashing algorithm called used in Bitcoin?
    SHA256
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Because you canā€™t duplicate it
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#4230

SHA-256
Brute force is currently in-feasible in terms of time/computational power due to the phenomenal number of potential solutions which would need to be tested.

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#4231

  1. SHA-256

  2. Too many probabilities hence not feasible

2 Likes
#4232

  1. SHA-256

  2. It takes huge amounts of computational strength to do the mathematical equations to create the hash.

1 Like
#4233
  1. SHA-256
  2. The hashing algorithm cannot be used in reverse to find the raw data from the hash output. Each hash provides a random number between zero and a maximum 256 digit value so there is an extremely high number of possibilities to work through, requiring huge computational capacity.
2 Likes
#4234
  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?

Its a one way function. Also, the input must not change to achieve the same hash output.

1 Like
#4235
  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?
    Thereā€™s too many probabilities to decrypt it.
1 Like
#4236
  1. SHA256
  2. I canā€™t quite explain this yet, but I know it has something to do with the ā€œone-wayā€ nature of the mathematical function and the use of large numbers.
2 Likes