Reading assignment: Hashing

Blockchain and Bitcoin 101
#1207

  1. SHA-256

  2. there are too many possibilities so it would be infeasible to brute-force

1 Like
#1208
  1. SHA-256
  2. There are far too many possible outcomes (2^256) for it to be time efficient enough to guess the right answer.
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#1209

  1. Bitcoin’s hashing algorithm is SHA-256.

  2. It’s infeasible to brute force bitcoins hashing algorithm because it would take too long to test even half of the possibilities to even get to a 50-50 chance of cracking it.

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#1210

  1. SHA-256

  2. This hashing algorithm is very difficult to brute-force because, as a 256-bit hash, it would take on average 2^127 attempts to break the pre-image resistance, which would take an infeasible amount of time

1 Like
#1211
  1. SHA-256
    2.Total possibilities are large. It would take lifetimes to guess.
1 Like
#1212
  1. SHA256
  2. The amount of possibilities make it extremely difficult to brute force
1 Like
#1213

What is the hashing algorithm called used in Bitcoin?

SHA-256 is the hash algorithm Bitcoin uses.

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

The sheer number of possible computations required to achieve ‘collision’ is so high
that present computational methods (hardware + software) can’t accomplish it –

although future methods - both new hardware & new software algorithms,
may eventually make this method crack-able.

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#1214
  1. SHA256
  2. Because of the large amounts of data being hashed.
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#1215
  1. What is the hashing algorithm called used in Bitcoin?
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?

A1. SHA256

A2. It is time consuming and takes too long

1 Like
#1216

1- sha 256
2- the hashes plus the nonce then hashed again makes it almost impossible to guess.

#1217
  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?
    In order to brute-force, it might take up to 2^128 - 1 computations need to be done to find the pre-image. It will be impossibly long in human time.
1 Like
#1218

  1. SHA 256

  2. There are too many possibility to find the right one in a lifetime.

1 Like
#1219

Q1. What is the hashing algorithm called used in Bitcoin?

  • SHA 256

Q2.Why is this hashing algorithm really hard (almost impossible) to brute-force?

  • The total number of possibilities and combinations is so large, than the probability of breaking by brute force turns infeasible.
1 Like
#1220
  1. SHA-256
  2. becouse it have to many input to test before finding the right one
1 Like
#1221
  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 infeasible to find the input value by only knowing the output. It would take such a long time to calculate this to the point where it wouldn’t make sense to attempt.
#1222

  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?

you would be comparing a hash output to such a large bit of data that by the time you unlock a block the attempt would be pointless or a waste of time.

1 Like
#1223
  1. What is the hashing algorithm called used in Bitcoin?
    SHA-256 (Secure Hashing Algorithm 256)
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    The chances of attaining the input with brute-force is ridiculously out of reach (a 2^256 chance). This provides a hell of a lot of security
1 Like
#1224
  1. What is the hashing algorithm called used in Bitcoin?
    It is called sha256
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Just because it is almost infiseable to find the input X from the output Y.
1 Like
#1225
  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 such a large number of possibilities that it will take too long to find the input.
1 Like
#1226

  1. What is the hashing algorithm called used in Bitcoin?
    A: SHA 256 is the name of the the hashing algorithm used for Bitcoin

  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    A: Brute-forcing the SHA 256 hashing almost impossible because each input has a unique hash.

1 Like