Reading assignment: Hashing

Blockchain and Bitcoin 101
#4076
  1. Secure Hash Algorithms or SHA-256, which was invented by NSA not Satoshi
  2. Because of the high number of nodes and PoW in Bitcoin network, the double-spending is continuously controlled by miners, which makes blockchain secure. Also, transaction should be confirmed by more than one miner which reduces any kind of hack.
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#4077

1 SHA-256
2 because its impossible to reverse for each input you get a totally unique hash. change anything and the hash will be different

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#4078
  1. SHA-256 invented by NSA
  2. Because it can only be solved in a linear, unidirectional fashion.
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#4079
  1. Secure Hash Algorithm (SHA-256)
  2. A hash i a one-way function which does not allow the reversal of a new hash. Bitcoin is solved in a linear unidirectional way.
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#4080

  1. Bitcoin uses the algorithm SHA-256

  2. If you were to feed the hash algorithm exactly the same data, you need to produce the exact same hash. Change even the slightest digit or comma and the hash output will be completely different.

3 Likes
#4081

1 SHA-256 is the hashing algorithm called used in Bitcoin

2 This hashing algorithm is really hard (almost impossible) to brute-force because the hash algorithms can only be solved to find the ultimate hash output, it can not be reversed to calculate the initial raw data

1 Like
#4082
  1. What is the hashing algorithm called used in Bitcoin?

The hashing algorithm used in bitcoin is called the SHA-256

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

The hashing algorithm is almost impossible to brute force because it cannot be reversed to calculate the initial raw data. This is because it is only calculated in a unidirectional order. Trying to ā€œreverseā€ the process would mean you would have to ā€œguessā€ through 1 of 2^256 options ( thats actually more guesses than the number of atoms in the known universe!)

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#4083
  1. Secure Hash Algorithm, SHA-256
  2. The output is a digit from 0 to 256. The possible outputs are large and the computation works in 1 directional so it is hard to reverse the hash function from the output to find the input
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#4084
  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?

SHA-256 generates an almost-unique 256-bit (32-byte) signature for a text. Itā€™s hard to brute force because each input has itā€™s own unique hash

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#4085

  1. SHA-256

  2. Because it involves very complicated mathematical equations, and once somebody achieves it, the equation becomes more difficult

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#4086
  1. SHA-256
  2. It is a one-way mechanism which can only be solved to find the output, not reversed
1 Like
#4087

  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 one directional.The process can not be reversed. Moreover, if you input the data into the function ( the BTC algorithm) you would get the same result ( ie output), change it slightly and the hash output is different.

1 Like
#4088

  1. What is the hashing algorithm called used in Bitcoin?
    Secure Hash Algorithm (SHA) named SHA-256

  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    Because this hashing algorithm is only one-way mechanism (unidirectional), and canā€™t be reversed to calculate the initial raw data.

1 Like
#4089
  1. SHA - 256
  2. It requires a lot of computation power to power. For example, in Bitcoin, it has gotten so difficult to mine profitably that there are dedicated machines to mining. Another reason is it is irreversible as to find the input to match the hash requires a ridiculous amount of guesses.
1 Like
#4090
  1. SHA-256
  2. Beause you never can reverse the output. There ar to many possibilities that it is impossible to find the input based on the output. There are more possibilities than atoms in the universe!
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#4091

SHA256
Because the mathematical manipulation of the file of data either small or large supplied to the function known as the variable is a one way sequential process in which the same data always produces or boils down the data to produce a 256 bit number in the SHA256 algorithm.

The analogy is a blender combining various fruits the blender pulp canā€™t be used to reconstruct the original fruit or food stuffs that were put into the blender to start the function.

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#4092
  1. SHA-256 = Secure Hash Algorithm-256 bit
  2. The hash algorithms can only be solved in a one-way manner to find the ultimate hash output, they canā€™t be reversed to calculate the original input data.
1 Like
#4093
  1. SHA-256
  2. The possibilities that 2 people have the same result is unlikely to happen, and even if it happens a slighty different , or - can change the outcome
1 Like
#4094
  1. What is the hashing algorithm called used in Bitcoin?

Bitcoin used the hashing algorithm SHA-256.

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

It is hard to brute force because of the sheer number of possible outputs. The possible outputs are so much that it would take an exorbitant amount of computational power.

1 Like
#4095

What is the hashing algorithm called in Bitcoin?
SHA-256
Why is this hashing algorithm really hard to brute force?
When information is entered into the hashing algorithm it is assigned an alpha-numeric code that once hashed becomes indistinguishable from is original entry data and cannot be reversed in order to understand what the original data information was ensuring that this data can never be altered or changed in anyway.

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