Reading assignment: Hashing

[Fabrice]

@serba

it is unlikely that any two individuals will come up with the same result at the same time. With such complexity, it takes so long that it wouldn’t matter.

You’re describing a hash collision. Brute forcing a hash means that you keep trying to guess the input, hash it and check if it matches the hash you want to brute force. It’s like brute forcing a pin number by trying every possible combination. Sha256 is such a big range of possible combinations that it isn worth your time and energy to keep guessing and hashing the input.

[Fabrice]

@Co-Star

To make it so hard to reverse engineer it becomes infeasible to do. Keeping the integrity of the whole blockchain is a very important factor of the technology.

It’s not about making it hard to reverse engineer, because that’s impossible, the only way to do this is by keep guessing the input until it matches the hash you want to brute force

[calvalini]

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?

The amount of possible outputs provided by SHA-256 would require several lifetimes to parse through individually, making it pointless.

[JCrypto]

1. SHA-256
2. It takes an extraordinary amount of time to determine the original input, so much time that it is not really feasible.

[Danielsan]

1. SHA-256
2. It is infeasible to brute-force because it would take too much time and effort to find the right hash trough computation, to many options witch grows with the amount of data hand in hand.

[Crabheadjams]

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

2. To brute-force SHA-256 it would take random guesses for decades to determine the input data based on the output hash.

[Kim]

1. SHA 256

2. Trying to brute-force the output to find the input would take so long, probably longer than a lifetime, which is so long that it wouldn’t even matter…

[CristianB]

1. SHA256
2. Because at this time there’s only one Sycamore quantum computer (that we know of) and Google has better things to do with it.

[carlogarciac]

• What is the hashing algorithm called used in Bitcoin?

Sha-256

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

The odds of comparing and finding a match using brute-force are astronomical.

[andreac]

The hashing algorithm used in Bitcoin is the Secure Hashing Algorithm 256 (SHA 256)

To brute force a this hashing algorithm, you will need to take a random input and hash it to find a matching output. Because there are just too many possibilities of inputs, it will take almost forever to brute force the hashing algorithm, making it unfeasible to do so.

[Tose]

SHA 256

It is virtually impossible to get the two same results evening trying almost an infinite amount of times.

[gmarcotte]

@ivan

• What is the hashing algorithm called used in Bitcoin?
• Why is this hashing algorithm really hard (almost impossible) to brute-force?

SHA 256 is used in bitcoin.

SHA 256 is really hard because it will take a really long time (years, decades) try all the possible combinations.

[sarahgibson]

1. SHA-256
2. Because the 256 hash is so large it is virtually impossible to apply brute force on it.

[Darnell_Calhoun]

1. SHA 256

2. The hashing algorithm is hard to brute force because brute force is a guess and check. What are you guessing? The input of a the hashed output. Sha 256 is based on a 64 character input comprised of a nonce which is a unique string of characters comdined with the hash of the block. You are basically trying to guess the “question”(input), unique assortment of characters, to the answer(output) which is also a unique assortment of characters. Not impossible but highly unlikely.

[Kelby_Rodriguez]

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

2. Why is this hashing algorithm really hard (almost impossible) to brute-force?
   Because of the amount of time it would take, due to the amounts of inputs to try would make it infeasible to find.

[Oscar_Ozaine]

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 very unfeasible because it would take too much time and effort to try every combination to guess the input of the hash function

[CaliCrypto22]

1. What is the hashing algorithm called used in Bitcoin?
   A: Shaw-256

2. Why is this hashing algorithm really hard (almost impossible to brute-force)?
   A: Because you have to pick a random input, hash it, and then compare the output with the target hash until you find a match. This is doable in the example they gave of six-sided dice, but becomes almost impossible (infeasible) when the amount of data is very large.

[Steven_Livasy]

*** What is the hashing algorithm called used in Bitcoin?**

SHA-256

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

  The hash key(the output) of the input is so long (256 bit) that to randomly guess the order of letters and numbers in order to guess the input would take so long it would be a multigenerational project.

[jott]

1. It is called SHA-256
2. Because the number possible inputs to be hashed is nearly unlimited.

[alesanchez]

1.The hashing algorithm used by Bitcoin is called SHA-256.
2.Brute-force to break a 256 bit encryption would take so long that it makes it not feasible to achieve.