Reading assignment: Hashing

Blockchain and Bitcoin 101
#4277

  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 it asks a lot of mathematical computing power and time to brute-force a hashing algorithm. So it is not worth your while.

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#4278

1: SHA-256 is the hashing algorithm used in Bitcoin, based upon a POW (Proof of Work) protocol.

2: SHA-256 is extremely hard to force because the miners are constantly competing to solve increasingly more difficult mathematical equations within the hashing algorithm. Finding the solution itself is a lottery of sorts whereas the more miners/competition the less chance of winning/solving a block. This condition/difficulty fluctuates dependent on competition giving it the ability to constantly adapt to keep the solved hash blocks at regular intervals. This method is built into SHA-256 & is unable to be changed, cheated or forced.

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#4279

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

  2. SHA-256 is almost impossible to brute-force because the input data is completely scrambled into an alphanumeric string.

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#4280

  1. SHA256

  2. The hash function is unidirectional, so the only way to know which is the input that generates a specific ouput, is through trial and error. So if we take into account the incredible high number of outputs for the funtion SHA(256) is really hard (almost impossible) to brute-force

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#4281

BTC hash algorithm is SHA-256.
the reason its hard to brute force is because its a new hash can not be reversed. Its a one way mechanism.

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#4282
  1. Secure Hash Algorithm 256 (SHA-256)
  2. Chances of matching the output with the input hash is infeasible and may take your entire life to make random guesses.
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#4283
  1. What is the hashing algorithm called used in Bitcoin? sha256
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force? because the hashing algorithm is designed to work one-way.
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#4284

  • Homework - Hashing

    • What is the hashing algorithm called used in Bitcoin?

Secure Hash Algorithm, referred to as SHA-256, which gives an output of a fixed length.

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

Term “brute force” = “reversing a hash and finding the message” which is simply impossible no matter how much computing power you have. it would be like wanting to find a and b in the equation (a+b=18). There is no mathematical way of finding a and b no matter how much power you have. All you can do is put different values in that equation and find other possible answers. and that is called “collision attack” where you try different messages and compute hash of each to find two that match (the collision attack) or have the hash and find another message that returns the same hash (preimage attack).

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#4285

  1. SHA-256

  2. The probability of breaking by brute force is very less due to large computation involved in the possible inputs to match the hash.

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#4286
  1. SHA-256
  2. There are too many possibilities for the hash rate to simply be brute forced
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#4287
  1. SHA 256
  2. Because if one element of the input is changed, it will produce an entirely different output. Much like the fruit smoothie example
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#4288

sha-256

The number of computational possibilities is so high with a 256 hash brute force would be impossible.

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#4289
  1. SHA-256
  2. With so many possibilities it would take a really long time.
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#4290

  1. SHA 256

  2. Each has provides a random number between 0 and 256. There are so many possibilities an incredible amount of computational capacity would be required. If the hash is above the target, it will need to be changed and may need to be tried over and over. Hashes are linear and can only solve output. They cannot be reversed to calculate raw data.

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#4291

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

SHA-256 hashing algorithm is used in Bitcoin.

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

Brute forcing the input for SHA-256 hashing algorithm would require up to 2^256 attempts which would take a lot of time and seems infeasible.

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#4292

Questions:
. Secure Hash Algorithm (SHA) - 256
. The input number is made of 256 digits so it is almost impossible to get the correct number as the number of possibilities is extremely high.

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#4293

1. What is the hashing algorithm called used in Bitcoin?
Bitcoin uses a Secure Hash Algorithmm SHA-256, which generates a fixed 256-bit hash.

2. Why is this hashing algorithm really hard to brute-force?
The compute power required to brute force will be immense and usually impractical.

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#4294

  1. SHA-256

  2. Number of possible combinations are too many to reverse calculate.

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#4295
  1. BTC has algorithm
  2. finality
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#4296

  1. SHA-256

  2. The time it would take to try to brute force would be beyond anyone’s lifetime, as the one direction and hash rate would be impossible.

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