Reading assignment: Hashing

Blockchain and Bitcoin 101
#4237
  1. SHA256
  2. Because of the time and computional energy required
2 Likes
#4238

  1. Bitcoin uses SHA-256 ( Secure Hash Algorithm 256 bit )

  2. you cant brute force this algorithm because hash’s can only be solved from the output of previous hash. information can only be added not changed.

1 Like
#4239

  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
#4240
  1. SHA-256
  2. It takes a large computational power to produce an input that matches the output in a hash function.
2 Likes
#4241
  1. SHA256
  2. The possibility to find the input based on the output is so difficult its impossible
1 Like
#4242
  1. Secure Hash Algorithm (SHA) named “SHA-256”.
  2. It is almost imposible to reverse the output of the function and get the input, it will require incredible amounts of computational power which makes it anti brute-force.
2 Likes
#4243
  1. SHA-256
  2. Unidirectional mathematical equations, and only the same inputs generate the same hash. The practically unlimited inputs need to be calculated and the result compared to the hash to know the original data of that hash.
1 Like
#4244

  1. the hashing algorithm in the Bitcoin blockchain is called Secure Hashing Algorithm (SHA) 256-bit. This gives the possible hash 256 possible value slots.

  2. The 256-bit hash function creates a “statistically” impossible combination to crack. meaning brute-forcing the hashing algorithm would require a near-impossible amount of computational power, which currently does not exist on this planet.

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#4245
  1. What is the hashing algorithm called used in Bitcoin?

Secure Hash Algorithm, referred to as SHA-256

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

The number of possible outcomes is so high that it would take a very long time. The hash number generated each time is unique and 256 characters in length. It would take a lot of computational power and a lot of time with little chance of success.

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#4246 
  1.SHA-256
  1. The hashing algorithm can only be solved to find the output and is nearly impossible to reverse it.
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#4247
  1. SHA-256
  2. It is almost impossible to brute force because each block is minted through a lottery that is harder and harder to win with more miners and mining equipment becomes prohibitively expensive through the difficulty increases, so one would need to control 51 percent of all this incredibly expensive mining power to attack the network.
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#4248
  1. SHA - 256
  2. Number of possibilities is too large
1 Like
#4249
  1. SHA - 256
  2. The hash algorithms can only fin the output and you cannot revese to calculate the input data
1 Like
#4250
  1. Hashing algorithm is called SHA-256
  2. Because it has one-way mechanism guaranteed by complicated math formulas
1 Like
#4251

1.Secure Hashing Algorithmm- SHA-256
2.It would take very long time to bruteforce it. This is 2^256 possibilities.

3 Likes
#4252
  1. A Secure Hash Algorithm named SHA-256.
  2. Bitcoin hash algorithms can only be solved in a linear, unidirectional manner, so there is no way to calculate the initial raw data - and with so many possibilities, mining is a lottery and an exercise of trial and error with low probabilities of success.
1 Like
#4253
  1. Secure Hash Algorithm (SHA) SHA-256
  2. Hashing algorithm is hard to brute force due to a vast number of possibilities to generate the starting point of the data.
1 Like
#4254

SHA-256.

It’s almost impossible to ‘reverse’ a hashing algorithm in order to produce the initial input.

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#4255

  1. sha - 256

  2. unique hashes are produced which cannot be undone or changed

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#4256

  1. The hashing algo is called SHA-256.

  2. Because it is done in a linear unidirectional manner which do not allow the reversal of a hash.

1 Like