Reading assignment: Hashing

Blockchain and Bitcoin 101
#262

  1. SHA-256

  2. Because you would need to guess the output that matches the input, the likelihood of this is astronomically unlikely.

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#263
  1. SHA256
  2. The amount of computational resources needed to find collision is astronomical therefore to brute force would not feasible.
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#264

  1. SHA 256

  2. The number of guesses it takes on average to get the correct value is too large.

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#265

  1. The hashing algorithm in bitcoin is called SHA-256

  2. It is really hard to crack due to the fact it is a one way function and the data from bitcoins blockchain is contstantly getting longer.

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#266
  1. SHA 256
  2. Because of its high min entropy, the chances of a brute force attack being successful are astronomically low! Not impossible, but its feasible that it will not occur.
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#267
  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?
    is infeasible to brute force due to the time that this process would take to find the right combination on the pool of the ones possible.
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#268
  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 is really hard to beak the algorithum because it is random and it might take 3 generations to guess the right private key.
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#269

1 The hashing algorithm used in bitcoin is Secure Hashing Algorithm 256 bit (SHA256)

2 This algorithm is considered pre-image resistant making breaking it infeasible - which means not very likely. With sha256 it would take 2^256 tries to guess the haseh number thru a brute force attack - which means you can guess the hash but it would take a very long time.

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#270
  1. SHA256^2
  2. The large degree of possible variables in the nonce.
#271

1.SHA 256: Produces a 256-bit hash.

2.So, while it is possible to break pre-image resistance via the brute force method, it takes so long that it doesn’t matter. It is a mathematical possibility so remote that it is practically impossible, there is not enough time to achieve the brute force method

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#272
  • What is the hashing algorithm called used in Bitcoin?
  • Sha 256
  • Why is this hashing algorithm really hard (almost impossible) to brute-force?
  • due to the cryptographic nature of having such a complex hash rate whereby it would take almost an infinite amount of time and energy to try and hack using brute force
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#273

  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 just take too long (life times) due to too many different values.
(I need to read more about this, I didn’t quite get it all lol)

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#274
  1. SHA 256
    2.SHA 256 is very hard to brute force because their are 256 bits that can either be a 0 or a 1 that makes the possibilty 2^256 to find the right one.
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#275
  1. SHA-256
  2. Because it would take too much time to computationally solve the hashing algorithm, which in the case of Bitcoin is 2^256 possibilities.
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#276

btc uses sha 256 and it is impossible using brute force because it would take decades of time

#277
  1. Sha 256 is the hashing algorithm used in Bitcoin
  2. The possible representations of any one hash are so great that to compare them all with the value of the Sha 256 hash would take an infeasibly long time.
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#278
  1. Sha 256

2.because is this mettod is too slow. and every hash is unicate result of inputs,so every change will notice.

#279

[quote=“ivan, post:1, topic:8422”]

  • What is the hashing algorithm called used in Bitcoin?

The hashing algorithm used in Bitcoin is called (secure hashing algorithm) SHA-256.

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

The reason is because it is using 264 bit hash which is very secure.And the entire process is randomly generating nonces (random strings) until they achieved their goal.Basically following proof or work protocol such as solving mathematical puzzles in a difficult way and checking answers should be easier for everyone and no cheat in the system.

#280

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

  2. The hashing algorithm is really hard to brute force because you would have to pick a random input, hash it and compare the output with the target hash until you find a match. SHA-256 is a 256 bit hash, so on average you would have to try this 2^255 times to succeed, which is 5.79 * 10^76. The chance of this happening is astronomically low.

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#281

1.What is the hashing algorithm called used in Bitcoin?
Bitcoin uses SHA-256
2.Why is this hashing algorithm really hard (almost impossible) to brute-force?
Because to determine a pre-image it is practically impossible due to the high number of possibilities,

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