Reading assignment: Hashing

Blockchain and Bitcoin 101
#3153
  1. Secure Hash Algorithm (SHA) named SHA-256
  2. It can only be solved to find the ultimate hash output, it can not be reversed to calculate the initial raw data. This one-way mechanism is guaranteed through intricate mathematical equations which do not allow the reversal of a new hash.
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#3154

  1. The hashing algorithm used in Bitcoin is called SHA - 256, created by the NSA.

  2. The hashing algorithm is almost impossible to crack based on the fact that it is a linear, unidirectional procedure that can only be done in one way. Similar to a blender. You put an apple and an orange into a blender, there is no way that after the two are blended that you can reverse the process and end up with the same apple and orange.

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#3155

  1. Bitcoin uses hashing algorithm SHA-256

  2. The hashing algorithm is almost impossible to brute force because it is irreversible. Each unique input has a unique output that can only be solved for in a linear manner.

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#3156

Answers to the Hashing questions.
1. What is the hashing algorithm called used in Bitcoin?
2. Why is this hashing algorithm really hard (almost impossible) to brute-force?

Q1. SHA256 (Secure Hashing Algorithm-256)

Q2. There is a lot of data with 256 bits of data. 2^256 possible combinations means even the best hardware in existence is unlikely to crack it, as it would have to enter exactly the same input from all of the possibilities. It’s a linear, unidirectional process that can only go from input to output.

Blender analogy

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#3157

  1. Bitcoin uses SHA 256 Hashing algorithm which was invented by the NSA

  2. nearly impossible to reverse the function to get the input -takes way too long

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#3158
  1. SHA-256
  2. There are 256 different combinations of variables as input, and each one generates a unique output. Takes too much time and effort to brute force.
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#3159
  1. Secure Hash Algorithm (SHA) named SHA-256
  2. SHA-256 is really hard to brute-force because it’s hash has 2^256 different possibilities and would take so long to find a collision.
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#3160

1 - SHA-256 (NSA)
2 - Almost impossible to brute force.

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#3161
  • What is the hashing algorithm called used in Bitcoin?
    -SHA256
  • Why is this hashing algorithm really hard (almost impossible) to brute-force?
    -The computational power to required to crack it is enormous and the hash cannot be reversed once created.
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#3162
  1. What is the hashing algorithm called used in Bitcoin?

Hash algorithm SHA- 256

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

It can’t be reversed to calculate the raw initial data, linear unidirectional.

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#3163

  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 would take too much time to bruteforce it. (2^256 possibilities)

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#3164

Answers to the questions:

  1. SHA-256
  2. It is not like encryption where you can decrypt. Its a one way direction only which makes it pretty hard.
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#3165
  1. What is the hashing algorithm called used in Bitcoin?
    SHA256 hashing algorithm
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Its almost impossible to find the input based on the output
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#3166

Bitcoin’s hashing algorithm is called SHA 256, the most secure algorithm.
The hashing algorithm is really hard to brute force due to the fact that it cannot be reversed and cannot be calculated to it’s initial raw data.

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#3167

  1. SHA-256 Secure Hash Algorithm

  2. Because the input is scrambled up and it is impossible to reconstruct or change any data to trick the other nodes to verify that the transaction is True.

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#3168

SHA-256
Hash output is in one direction and can not be reversed

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#3169
  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?

The quantum computing needed to reverse a SHA-256 hashing algorithm does not exist yet at least as far as the larger Tech communities are concerned. It would take a billion years to crack the hash of a single bitcoin address. It is like trying to count to infinity, the sooner you begin, the faster you’ll never get there.

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#3170
  1. Secure Hash Algorithm (SHA)
    SHA-256
  2. A hash algorithm cannot be reversed in
    order to determine the original data.
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#3171
  1. Bitcoin uses Secure Hash Algorithm (SHA) 256 (SHA-256), developed by the NSA.
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    256 is the high end of standard sizes of hash algorithms, meaning the outputs (the produced hashes) are complex enough to not be able to be reverse engineered with current technology, making hash functions functionally unidirectional and hence secure.
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#3172
  1. What is the hashing algorithm called used in Bitcoin?

Secure Hash Algorithm (SHA) 256

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

It is almost impossible to brute-force SHA-256 because the output, or hash, is a 256 bit alphanumeric code that is impossible to reverse. The reading uses the example of ingredients in a blender. Initial ingredients are put into a blender and then blended. Once you get the end result it is impossible to go back to recreate the original ingredients.

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