Reading assignment: Hashing

Blockchain and Bitcoin 101
#3795

1.SHA-256
2. They can not be reversed to calculate the initial raw data, only solved in a linear unidirectional manner. One-way mechanism.

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#3796
  1. What is the hashing algorithm called used in Bitcoin?
    SHA-256 hash algorithm
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Because the algorithm can’t produce the same result from different inputs. By brut force, it will take a very long time
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#3797
  1. SHA256 hashing algorithm

This one-way mechanism is guaranteed through intricate mathematical equations which do not allow the reversal of a new hash. Therefore, a Bitcoin hash is only solved in a linear, unidirectional manner.

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#3798
  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?
The number of computational possibilities is so high with a 256 hash that it would be infeasible to brute forcing it.

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#3799

  1. The hashing algorithm used in Bitcoin is called SHA-256 (a secure hash algorithm invented by the National Security Agency (NSA)).

  2. This hashing algorithm is really hard (almost impossible) to brute-force because the algorithm is a one-way mechanism that can only be solved to find the ultimate hash output (i.e. it cannot be reversed to calculate the initial raw data because the algorithm’s mathematical equations do not allow the reversal of a new hash).

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#3800

1. What is the hashing algorithm called used in Bitcoin?
The algorithm used by Bitcoin is SHA-256 where SHA stands for “Secure Hash Algorithm”.

2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
Because SHA-256 is an irreversible hash function (one-way method). For a given output it is nearly impossible to find the input using the given hash function.

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#3801

1.Secure Hash Algorithm named SHA - 256.

2.Because the amount of combinations that are allowed, it’s hard or almost impossible to reverse the output of the function to get back the input.

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#3802
  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?
    The hash power of the network is very high and 256bit encryption would require large amounts of time given current computer technologies to solve.
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#3803
  1. SHA-256
  2. because it works in a linear manner and cannot be reversed
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#3804
  1. What is the hashing algorithm called used in Bitcoin?

a) 256 bit Secure Hash Algorithm (SHA-256)

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

a) Due to the computational resources, or time required, to reverse engineer output to input. Breaking a 256b hash would require computational resources that don’t exist today (advances in quantum computing) or more years, using today’s computers, than our grand children will be alive.

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#3805

1.SHA 256
2. Because there are only 256 characters for the hash combination

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#3806

What is the hashing algorithm called used in Bitcoin?
A: SHA-256
Why is this hashing algorithm really hard (almost impossible) to brute-force?
A: Because this hash algorithm is a one-way, unidirectional mechanism, it cannot be reversed to discover the original raw input set. So, the only way to brute-force a hash algorithm is to guess the right alphanumeric combination… which is pretty-much statistically impossible. However, there will be new technology (quantum computers) that will make brute-forcing a hashing algorithm easier… in the future, this will be a concern.

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#3807
  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?

There are 2256 combinations and in today’s technology only something such as quantum computing could reverse this number.

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#3808

  1. A hashing algorithm in Bitcoin is called SHA-256

  2. The BTC hash is only solved in a linear, unidirectional manner and does not allow the reversal of a hash.

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#3809

HASHING

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

*** Why is this hashing algorithm really hard (almost impossible) to brute-force?**
SHA-256 is a one-way, linear, unidirectional process that do not allow reversal; hence making it almost impossible to brute-force.

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#3810

Answer the questions below.
What is the hashing algorithm called used in Bitcoin?

It is the SHA256 bit algorithm.
• The Secure Hash Algorithm (SHA);
• 256 bits being the return length of the string, and;
• The Algorithm, the mathematical functions used to compute the hash.

The mathematical functions selected are considered to be one way because the inverse function is astronomically harder to compute from the hash.

Why is this hashing algorithm really hard (almost impossible) to brute-force?
The algorithm to iterate the inverse functions is a virtual impossibility as the result set is prohibitive.

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#3811
  1. SHA-256
  2. every Hash is unice and can not be rederved in the original data.
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#3812

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

Bitcoin uses the SHA-256 hash function / algorithm.

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

Due to the fact that no two inputs can ever be hashed to the same 256-bit hex output, this means that it is almost impossible to guess / find / compute the data which produced a given hash using brute force guess and check.

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#3813

1.The hashing algorithm in Bitcoin is called SHA-256.
2.The hashing algorithm is really hard to brute-force because there are so many possibilities it would take for ever to get the same two.

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#3814
  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?
    *because current computers do not possess enough power to brute-force the algorithm, it would take too long *
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