Topic: 64. Can the Transfer of the Inventor of the Puzzle Be Manipulated? - page 2. (Read 597 times)

Yes, I'm sure they'll find it in such a short time. They can create RBF in 1 minute in total. Do you have an idea as a solution to this?

There is no miner that I know of and I have no idea how the miner will manually confirm the transaction.

Thank you, now I know 1 confirmation is enough.

First, you have to know that finding a private key with Kangaroo in range 8000000000000000 to FFFFFFFFFFFFFFFF takes less than 10 seconds with a gpu like RTX 2080ti as I tested.
Replacing a tx in such a situation was also a question for me:
https://bitcointalksearch.org/topic/is-it-possible-to-cancel-a-transaction-with-false-rbf-5361673

I do not know much about this but if people can have agreements with miners for double-spend transactions, that seems "sketchy".

Yeah, this would never happen. They could listen for that output, rent a VPS and GPUs...but they would have to rent 10,000 V100s for 14 hours to solve for the 1.2 BTC...I am sure by then, the transaction would be complete, plus, I am sure renting 10,000 V100s for 14 hours would exceed $75K.

You must be referring to this puzzle. When I previously responded, it was unclear to me that you were not referring to a transaction whose inputs were not being spent by a private key that was generated with 160 bits of entropy. I am not sure your math is correct, but if it is:

If you were to solve one of these puzzles, you can firstly not enable RBF, so nodes should not accept a double-spend transaction by default. This should make it unlikely that a pool will even know about any competing transaction after someone learns of the private key based on the public key. Although someone could have an existing agreement with a miner to allow them to confirm competing/double-spend transactions.

You can avoid the above by contacting a miner directly and asking them to confirm your transaction without having the transaction previously broadcast publicly. There would still be the risk that the miner would calculate the private key and confirm a competing transaction themselves.

Other than the above, you can also obtain sufficient hash power in order to find a block on your own, and you can confirm the transaction without it being publicly broadcasted.

1.2 BTC is currently worth close to $75k. Someone could potentially create a program that listens for a transaction that spends one of a set of outputs, rents a VPS and GPUs on GCS, and executes a script that will find the private key, and create a competing transaction.

That's what you get when solving "puzzles", there is always a risk of someone else solving it whether on their own or based on your solution. But if you don't want a transaction to be replaced easily then don't mark it with RBF! and pay the high priority fee.
Spending the same output of a transaction that wasn't marked by RBF would make it a double spend and majority of nodes won't relay the double spend transaction.

Are you sure, 3 min doesn't sound right for 64-bit key.

You don't need 3 confirmations, 1 is enough. More is for protection against 51% attacks which can not happen in bitcoin due to the huge amount of money it requires.

Even though the average time between blocks is around 10 minutes, you can never be certain if your transaction will be mined within that timeframe. Sometimes, no block is found for 30-40 minutes. You can also get lucky and there might be a few blocks mined one after another in a short period of time. As for the fee, 1 sat/vbyte has been enough to get a transaction confirmed quickly for quite some time now. You should check mempool.space beforehand. It seems to have very accurate estimates.

if I find the 64th puzzle, I need to try the method that can handle the bitcoin transfer time in 5 minutes.

How much is paid for the transfer, confirmation can be obtained within 5 minutes?

Yeah probably possible. On the other hand, why would you listen for potentially few years on the nodes with ready to crack hardware to get 1.2 btc to make a potentially successful double spent attack?

It can decode 64 bit range with Kangoroo in a maximum of 5 minutes. In other words, the range and public key are certain, and it is clear in how many minutes it will be resolved. I would be glad if you look at it here.

In order to spend any bitcoin, you need the private key associated with the address.

It is not trivial to get the private key from the public key, in fact, there is no known way to calculate the private key from the public key. Quantum computing may change this, however, we are still a long way away from a Quantum Computer being able to get the private key from the public key.

Note: Google Translate is used.

My computer has been searching for about a year, and I'm not hopeful.

However, today it occurred to me that the transfer of the person who finds the 64th puzzle may be cancelled.

In other words, after the transfer process starts, the public key will be revealed and thieves who do not deserve it will find the public key within minutes with Kangoroo. Then they will open a double trade with RBF by spending high, the transfer of the person who finds it will be cancelled.

It occurred to me that the thief would figure it out in about 3 minutes.

The average bitcoin transfer confirmation takes 10 minutes and can be canceled without 3 confirmations. (I could be wrong, please correct me.)

How can you get 3 confirmations in 5 minutes in Bitcoin transfer?