Reading assignment: Hashing

Blockchain and Bitcoin 101
#3133

1.SHA-256 (Secure Hashing Algorithm)
2.It is almost impossible to brute-force because it would take a quantum computer to guess a correct answer with 2^256 possible outcomes

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#3134

Alec’s Answers

  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 there are 256^256 possible combinations of the hash to test to find the right one. The likelihood, time and resources needed to do this would be astronomical or even alien.
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#3135

  1. The hashing algorithm is called “Secure Hash Algorithm-256”(SHA-256)
    standart and popular sizes include the 64 bit,128 bit and the 256 bit.

  2. The output of the function is called Hash, they can not be reserved to calculate the initial row data, a method with possibilities to give you a unique value.

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#3136
  1. Secure Hash Algorithm 256 (SHA-256)
  2. Due to high amount of possible outputs.
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#3137

  1. Secure Hash Algorithm, referred to as SHA-256

  2. The SHA-256 algorithm used in Bitcoin is almost impossible to brute force because it is very difficult to find two inputs to produce the same output in a hash function.

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#3138
  1. SHA-256 (Secure Hash Algorithm).
  2. It’s a one-way function, it can’t be calculated backwards to determine the original source data, because of a form of secure encryption. The algorithm takes data and transform it into an algorithm output, which is from 0 up to 256 characters.
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#3139
  1. SHA-256
  2. The number of all possible inputs is so enormous, making it almost impossible to find the input based on the output.
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#3140

1.) The hashing alogrithm used in Bitcoin is called SHA256.

2.) SHA256 is designed to have a very difficult inverse to find meaning you can’t “cheat” the algorithm and find the answer having asked just one question, this means you have to try and find a correct hash by simply trying many different inputs until you get an output that is accepted.

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#3141

The Hashing Algorithm is called SHA-256 and was developed by the NSA is America.

The Hashing Algorithm is next to impossible to Brute-Force due to the shear size of computing power needed.

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#3142

  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?
    Turning the hashed output back into the original data would take an immense amount of computational power and likely not be financially worth that investment.

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#3143

  1. SHA 256

  2. The hash created by the algorithm is completely unique and consist of 256 different characters making it nearly impossible to guess. These hashing algorithms also cannot be reversed.

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#3144

  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?
    Brute force is infeasible as the computational possibilities with a 256 hash is to high and time consuming

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#3145

What is the hashing algorithm called used in Bitcoin?

It’s called SHA-256 (256-bit secure hash algorithm) and it was actually invented by National Security Agency in the US. i

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

Because of the algorithm’s unidirectional property, which means that the raw data from which an output - hash was processed, cannot be extracted.

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#3146
  1. Hash algorithm SHA- 256
  2. its is secure and irreversible, as its solved in the linear manner.
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#3147

  1. SHA-256

  2. The algorithm is almost impossible to brute-force as it produces a unique cryptographic hash which does not expose the initial raw data input. Therefore it’s almost impossible to reverse.

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#3148
  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?

Each has provides a random unique number like a lottery which does not expose the input. Bitcoin clients compare their performance to the average time set at two weeks. Based on this the target is modified accordingly, making the PoW more or less challenging.

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#3149
  1. Is a function that creates an unique 256 bit result which can’t be duplicated.
  2. Because by the simple fact of changing one character the results turns completely different.
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#3150

1, SHA-256
2, The large possible input numbers make the output impossible to reverse engineer

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#3151
  1. SHA-256
  2. The hash cannot be reversed to the exact original input. It’s like putting seperate ingredients in a blender to make a milkshake. The product cannot be reversed back to the original ingredients.
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#3152
  1. SHA256
  2. Computation can only go one way. Plus, it’s in the blender now. Can’t unblend the fruit juice anymore
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