Reading assignment: Hashing

Blockchain and Bitcoin 101
#2311

  1. SHA 256: Produces a 256-bit hash. This is currently being used by [bitcoin]

  2. To crack the Hash by using Brute Force would take an incredibly long time to successfully complete, hence it does not matter

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#2312
  1. SHA 256
  2. pick up a random and find the INPUT HASH and compare the OUTPUT with the target hash and repeat until you find a match
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#2313
  1. What is the hashing algorithm called used in Bitcoin?
    SHA256
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    The probability of having the 2 same outcomes in 2^256 is very hard to do would take millions of years in the computing power we have today.
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#2314

  1. SHA-256

  2. Because of certain properties that a cryptographic hash function have in order to be considered secure.

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#2315
  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?
  • Because of the time spent to guess the value is huge. Worst scenario would be 2^256 and average = 2^256/2. The best scenario ir really unlikely to happen!
1 Like
#2316

  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?
    That nobody can do a reversal calculation and get the input datas

2 Likes
#2317
  1. SHA-256
  2. This hashing algorithm is very difficult to brute force because it requires guessing in order to really even attempt to reverse engineer the function. Even for a computer it would take years to reverse engineer a SHA-256 function
2 Likes
#2318

  1. SHA 256

  2. It would likely take 100’s of years to brute force it successfully to randomly find the correct input out of vast amount of possible inputs (astronomically large number).

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#2319

1/ it is an output delivered in 256 bits
2/ Due to its characteristics based on cryptography, it only has one way of being “hacked”, and this is luckily, trying one by one until obtaining the sought hash, and as the probabilities it has are so high (10 to 24 ), makes it almost impossible

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#2320
  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 possibilities is way too large to be guessed correctly. It is not mathematically impossible, but it would take an eternity and an insane amount of computing power.
2 Likes
#2321

SHA256

Because the output of the hash does not in any way reveal the inputs. There is no way to divine the input from the output, and successfully guessing the input is therefore extremely unlikely.

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#2322

  1. What is the hashing algorithm called in Bitcoin?
    The hashing algorithm in Bitcoin is called SHA-256.

  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    This hashing algorithm is really hard to brute-force because each input will have it’s own unique hash.

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#2323

What is the hashing algorithm called used in Bitcoin?

Bitcoin is using SHA-256 as hashing algorithm

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

The properties of the hashing algorithm allows a large range of possibilities, and difference between passwords brute-force to hashing brute-force are:

  1. There’s no DB of ‘popular hash values’ for the attacker to use as baseline for the attack like maga2020!.
  2. The attacker cannot pre-plan the order of range his going to use since the hashing output changes significantly with every change as small as it might be to change the entire string with no distinguish resemblance between the hash values.
  3. In order to brute force attack the range of possibilities is equals to 2^256, which is a number so big that i don’t know how to address it in words… google gave me this: 1.1579209e+77
2 Likes
#2324
  1. SHA 256
  2. By creating long and complex hash functions from all inputs the odds of guessing the correct one is virtually impossible.
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#2325
  1. Secure Hashing Algorithm 256 or SHA-256 in short
  2. because the possibility of 2 hashes to be the same is near zero, and even if you manage to brute-force one block you still need to brute-force all previous blocks continuously because the previous block is always embedded in a new block.
3 Likes
#2326

  1. SHA- 256

  2. The hashing algorithm is hard to brute force as the number of varibles are so astronomical it could take multiple lifetimes to guess it

2 Likes
#2327

  1. SHA-256

  2. Because it’s infeasible to determine what the values are by using brute force, it would take too much time.

2 Likes
#2328
  • What is the hashing algorithm called used in Bitcoin?
    Bitcoin uses the hashing algorithm SHA-256 ( secure hashing algorithm 256 )
  • Why is this hashing algorithm really hard (almost impossible) to brute-force?
    It is mathematically possible but the number is so big that its infeasible and if it did happen so much time would have passed that it wouldnt matter
2 Likes
#2329

SHA 256

It would take many lifetimes to guess through the possibilities.

2 Likes
#2330

The hashing algorithm is called SHA-256 that is used in Bitcoin, Secure Hashing Algorithm 256.

This hashing algorithm is really hard to brute-force because the only way to try to brute force it is by finding a random input and hashing it to compare the output with the target hash until you find a match which is very close to impossible.

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