Reading assignment: Hashing

Blockchain and Bitcoin 101
#4539

  1. Bitcoin uses SHA-256 which was originally created by the NSA.

  2. This is a linear algorithm in which is very easy to verify the final output if you have the input, but very difficult in the opposite way.

1 Like
#4540

1 - SHA-256

2 - The total number of possibilities is so large that it is unlikely two people get the same result in their life time.

1 Like
#4541
  1. SHA 256
  2. Because the chances of two people getting the same hash is very very slim.
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#4542
  1. SHA256
  2. Hashing algorithm is complicated to crack due to mathematical computation. possibilities is so large. (input based on the output)
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#4543
  1. SHA 256
  2. Bitcoin has algorithms can only be solved to find the ultimate hash output, they can not be reversed to calculate the initial raw data. It’s like putting ingredients in a blender to make a soup. Once the soup is made, the ingredients can’t be retrieved in its original form.
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#4544
  1. The Hashing Algorythm is called SHA-256
  2. Because of the amount of trials needed to solve the Hash equation in the first place to create a new block every 10 minutes, which is 14TH/s . Also you need a very advanced computer system and special designed software to even solve the equation, which compared to a lottery.
    And you can only solve it with the 100% correct input otherwise the result will be completely different. The equation can not reversed. And on top of it, the equation is made more difficult by the use of nonce.
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#4545
  1. SHA-256
  2. The main protection against brute-force attacks is the sheer number of possibilities an attacker has to go through to find a correct answer. This means an attacker has to spend an inordinate amount of resources / time to get a correct answer by brute-force, thereby missing the window of oppertunity or the profit doesn’t warrent the resources spent brute forcing.
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#4546

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

2: Because dedicating hardware and software is needed for the hashing algorithm. In other words, no typical home computer can mine Bitcoin today.

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#4547
  1. Hashing algorithm in bitcoin is called SHA-256
  2. It is hard or almost impossible to find the input based on the output and if it were to change it would change the whole chain.
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#4548
  1. SHA-256
  2. For 2 inputs to produce the same output is like 16^256 which is very very unlikely, which means that it is almost impossible to reproduce a hash.
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#4549

  1. Secure Hash Algo SHA 256

  2. the probability is extremely low and it’s not worth the time and resources

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#4550

sha 256
it almost impossible because the hashfunction is is a oneway function from input to output,and would probably take you whole life to create a different function with the same hash

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#4551
  1. The hashing algorithm used in Bitcoin is called SHA-256.
  2. It would be practically impossible to brute-force this hashing algorithm bc it would be practically impossible to reverse-engineer an input that would be able to reproduce the original input.
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#4552
  1. SHA-256
  2. The probability is extremely low to get it right, so it is necessary to repeat it over and over again with a changing input to get a result below the target. It is not possible to learn from failed trials, because the output is completely random. Every try has the same probability of success
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#4553
  1. SHA256
  2. This one-way mechanism is guaranteed through intricate mathematical equations which do not allow the reversal of a new hash.
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#4554
  1. SHA 256
  2. One way mechanism using linear mathematical computation.
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#4555

  1. The hashing algorithm is called SHA-256 (Secure Hash Algorithm)

  2. It would be almost impossible to brute-force because of the large amount of computational capacity needed to keep up with the increasingly difficulty of solving the ongoing proof of work network.

2 Likes
#4556

It is called Secured Hash Algorithm 256 (SHA 256).

Because it can never be reversed, and never can be use or treated as any form of digital fingerprint of the data which was originally processed.

2 Likes
#4557
  1. Secure Hash Algorithm (SHA) named SHA-256.
  2. The amount of data is very huge and would take very long time to brute-force it.
1 Like
#4558
  1. SHA 256
  2. Reversing a hash fxn is near impossible/very unlikely
1 Like