Reading assignment: Hashing

Blockchain and Bitcoin 101
#1830

Hashing algorithm used in Bitcoin is called SHA-256

The hashing algorithm is really hard to brute-force because it is very difficult to pick up a random input hash it and compare the output with the target hash as there are 2^128 computations involved and it is almost impossible.

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#1831

SHA 256

There are soo any possibilities, makiing the time to solve extremely long like lifetimes.

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#1832

  1. Secure Hashing Algorithm, SHA-256

  2. You would have to make pure random guesses, which could take and entire life time to guess the correct one, but would still be nearly impossible to do.

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#1833

  1. SHA256

  2. because the number of possible outputs is massive (2^256). there is also no clear pattern between input and output.

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#1834

Yes, it is on the list :slight_smile:

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#1835
  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?

It is really hard to do brute-force because the amount of calculations you would have to do would be so huge that it would be prohibitively time-consuming.

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#1836

  1. hashing algorithm in Bitcoin is SHA256

  2. the hashing algorithm is really hard ( almost impossible) to brute force as sha256 has require 2^256 tries to find the correct output.

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#1837
  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 would require you to try 2^256 -1 times.
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#1838
  1. What is the hashing algorithm used in Bitcoin called?
    A: SHA-256
  2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
    A: SHA-256 is infeasible to brute-force because of the 3rd property of cryptographic hash function, Pre-image resistance. Wherein it is infeasible to determine the input of the hash when the amount of inputs is of a vast amount.
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#1839
  1. SHA-256
    2.To secure the information for speciffic people.
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#1840

1.) SHA-256

2.) It would take several lifetime’s to figure the output based from two input’s making it nearly impossible.

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#1841

1)The hashing algorithm used in Bitcoin is called SHA-256
2) Because of the amount of data. It would be virtually impossible to find the input based on the output

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#1842

1.What is the hashing algorithm called used in Bitcoin?
SHA-256 is hashing algoirthm used in bitcoin

2.Why is this hashing algorithm really hard (almost impossible) to brute-force?
The number of possibilities is large and infeasible to crack with brute force.

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#1843
  1. The hashing algorithm used in Bitcoin
    is SHA 256-Bit.
  2. It is really hard to brute force SHS 256-bit because of its deterministic security property. No matter how many times you parse through a particular input through the hash function, you will, always, get the same results.
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#1844
  1. SHA-256;
  2. large computation is required to check every input.
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#1845

1, SHA 256
2. It is infeasible because finding such a large number at random wouid take lifetimes (unless improbably lucky).

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#1846

Q).What is the hashing algorithm called used in Bitcoin?
A).(bitcoin uses SHA-256) which gives an output of a fixed length. (DETERMINISTIC).

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

A). There is a specified( DETERMINED/FIXED) hash rate for each block to be mined to maintain a specific and predictable supply of Bitcoin.

2 Likes
#1847

Well, everyone can use hash functions if they want, but the question was why is it hard to brute force a hash function? :slight_smile:

#1848

That is true, that’s why hash functions are useful. But the reason why is it hard to brute force is because its hard to get an input from the output :slight_smile:

#1849

What you are referring is searching for a new hash that suits the target requirement, while brute forcing means trying to find an input from a hash. :slight_smile:

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