Reading assignment: Hashing

Blockchain and Bitcoin 101
#3955

  1. SHA-256

  2. Tons of possible outputs, but only the perfect output works. Any small change in the output results in a completely different result. Sheer size of this output prevents anyone from attacking the network.

2 Likes
#3956

1 SHA-256

2 Its not revarable, its a one way method. Raw data is not possible to backwards calculate.

3 Likes
#3957

1.SHA-256
2.The one-way mechanism is guaranteed through intricate mathematical equations which do not allow the reversal of a new hash. Therefore, a Bitcoin hash is only solved in a linear, unidirectional manner. The target is a 256-bit alphanumeric code which all Bitcoin clients share. The lower the target’s value is, the harder it is to generate a new block.

3 Likes
#3958
  1. What is the hashing algorithm called used in Bitcoin?
    Bitcoin uses the SHA-256 hashing algorithm.

The output from a hashing algorithm is non-reversible. The only way to determine the original input is through brute-force by trying different inputs until the resulting hash matches the original hash.

1 Like
#3959
  1. What is the hashing algorithm called used in Bitcoin?
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?

Bitcoin uses SHA-256
A bitcoin hash is solved in a linear non-reversed manner.

1 Like
#3960

1.SHA-256
2.It is impossible to brute force becouse there are 0 to 256 digit value. And the possibilitys to calculate are almost impossible with normal computers.

1 Like
#3961
  1. What is the hashing algorithm called used in Bitcoin?
    It is called Secure Hash Algortihm which was named SHA256. Letter 256 stands for 256-bit size.

2 Why is this hashing algorithm really hard (almost impossible) to brute-force?
Because the operation can not be reversed to calculate the initial raw data. A Bitcoin hash is only solved in a linear, unidirectional manner. Also each hash (output) provides a random number between zero and a maximum 256 digit value which needs to be smaller than the target. If it is not smaller you have to do the work all over again. People compare this to winning a lottery.

2 Likes
#3962

  1. SHa 256 is the Bitcoin hashing algorithm

  2. It is too hard to find 2 inputs to produce the same output

1 Like
#3963

  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 they can only be solved to find the ultimate hash output. They can’t be reversed to calculate the initial raw data. (the Blender Example) There are far too many possibilities to figure out.

1 Like
#3964
  • What is the hashing algorithm called used in Bitcoin?

It uses SHA-256

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

It’s almost impossible because it uses intricate mathematical equations that cant be reversed. Possibilities are are many.

1 Like
#3965
  1. SHA-256 Algo.
  2. A Bitcoin hash is only solved in a linear, unidirectional manner. Each hash is unique and it’s verified by multiple miners and the computer network. Once you enter the input value and it provides you an output it can’t be reversed.
1 Like
#3966

1.SHA-256
2. Unidirectional, Hash should be less than or equal to Target and Miners are competing with each other to get incentivized. Getting a Block is more of Trial and Error and with success rate very low.

1 Like
#3967

Best 2nd answer ive read

1 Like
#3968
  1. What is the hashing algorithm called used in Bitcoin?
    A Secure Hash Algorithm named SHA-256
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Since it is impossible to calculate the origional data, brute-force would come down to just guessing. With the amount of possible answers, it would be vertually impossible.
1 Like
#3969
  1. SHA-256
  2. Every brute force attempt has to account for the entire pool of possible SHA-256 values. There are 115792089237316195423570985008687907853269984665640564039457584007913129639936 possibilities.
2 Likes
#3970

1- SHA-256
2- Brute forcing would require to much time

1 Like
#3971

Thanks man! :slight_smile:

1 Like
#3972
  1. SHA-256 ( Secure Hash Algorythm 256 )

2.Because SHA-256 is irreversable and is used in a unidirectional manner wich means it won´t allow the reversal of a hash code. It´s 256 Digit function wich will produce a completely different output when only the slightest input is changed.

1 Like
#3973

  1. What is the hashing algorithum called used in Bitcoin?
    SHA-256 created by the National Security Agency NSA

  2. Why is this hashing algorithm really hard (almost Impossible) to brute-force?
    Hash algorithm is vital in keeping the blockchain safe and secure. The hash can only function one way and it can not be reversed. The initial raw data can not be revealed.

1 Like
#3974
  1. What is the hashing algorithm called used in Bitcoin?
    SHA (secure hash algorithm) 256
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Because the combination of input to obtain the same output are virtually endless, hence to crack it you need tremendous power and infinite time
2 Likes