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1041  Bitcoin / Development & Technical Discussion / Re: 64. Can the Transfer of the Inventor of the Puzzle Be Manipulated? on: October 31, 2021, 05:18:09 PM
You have to know how kangaroo program works. A single V100 can solve a 64 bit key using kangaroo in mere seconds. One cannot use kangaroo to crack #64 now because the pub key is not known. But once someone broadcasts to transfer the BTC from #64's address, the pub key will be exposed and someone can use a single GPU to solve for the private key in seconds. That is what the OP is saying. As others have stated, using the RBF with decent fee, will help from others "stealing" #64s key.
Do you have a reference for saying that a single V100 can solve a 64 bit (of entropy) key in seconds?

If what you are saying is true, it would be advisable to not use RBF. The RBF would need to be set to False and a decent fee that is sufficient to be included in the next block should be used.

I looked at some of the documentation for kangaroo, but have not looked at the math closely.
1042  Bitcoin / Development & Technical Discussion / Re: 64. Can the Transfer of the Inventor of the Puzzle Be Manipulated? on: October 31, 2021, 11:05:00 AM
Given that the private key range is known for each puzzle, I am not sure I understand the advantage that someone will have once the public key is known.
For Pollard's Kangaroo, you need to know the public key that you're trying to match.

OP was theorising that once they publish their transaction, someone could use Pollard's Kangaroo to trivially solve the private key in a matter of minutes and then publish their own transaction stealing their prize.

I'm not overly familiar with the performance of this particular algorithm or the available scripts for it... but if the actual winner just disables RBF and sends with a "decent" fee, the odds of their prize being "stolen" would be pretty minimal, I would think.
It was reported that one Tesla V100 can check 715 M keys per second by using bitcrack. Assuming you can get google to rent you 176k V100's, I calculate a 1 in 488 chance that you will find the private key within 5 minutes. It was reported on that same post that a V100 can make 1430 Million "kangaroo jumps" per second (about 2x as many private keys tas than it can check using bitcrack). Assuming that the scope of what needs to be searched is the same, this would give someone a 1 in 244 chance of finding the private key within 5 minutes.

I am not sure how many V100 google has on its platform but 176k is a lot, but I calculate that many V100s as having a retail price of about $1.1 billion. If you spend more than 5 minutes trying to crack the private key, you will be spending more money than the value of the coin in the address.
1043  Bitcoin / Development & Technical Discussion / Re: 64. Can the Transfer of the Inventor of the Puzzle Be Manipulated? on: October 31, 2021, 03:04:44 AM
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?
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.
Where did this value of 1.2 BTC come from? Huh

The Puzzle #64 address only has a balance of 0.64020585 BTC Huh

Or is the 1.2 BTC the total value of all the "prizes" that have been claimed so far... and someone is theorising that an attacker may have attempted to setup a monitoring rig to try and steal all the prizes? Huh
I got it from the OP. As are the other metrics mentioned unless stated otherwise.

I haven’t looked at the OPs math.

The Tesla V100 costs about $0.21 per 5 minutes to rent from GCS. I don’t know if google has the capacity, but someone could rent ~357k GPUs for 5 minutes for $75k. I don’t know if this would be sufficient to find the private key. You can rent ~176k for 5 minutes for half that.

If you can figure out how to quickly calculate addresses on a TPU (ASIC that is designed for matrix multiplication), you can rent ~880k TPUs for 5 minutes for $75k. If performing calculations that TPUs are optimized for, the efficiency of a TPU is at least a factor of 10 more efficient than a GPU. Although I don’t know if google will allow you to scale that many TPUs.

Given that the private key range is known for each puzzle, I am not sure I understand the advantage that someone will have once the public key is known.
1044  Other / Meta / Re: No begging - did I catch on rule #7 on: October 30, 2021, 07:43:03 PM
Someone reported the topic and the mod had no choice but to follow the rules of the forum.
Mods always have a choice. I reported the topic 10 days ago, and it took this long to be deleted. Or maybe more people reported it since then.
I also reported it 10 days ago, and the report remained unhandled until recently.

My guess is that several mods decided against removing the thread, and another mod was handling older reports and decided to remove the thread.

I do agree that the no begging rule should be enforced more evenly, or clarified to be acceptable under certain circumstances. There has been a number of established forum members over the years that have been able to have threads open that amounted to begging.
1045  Other / Meta / Re: No begging - did I catch on rule #7 on: October 30, 2021, 01:47:13 PM
The OPs thread was moved to the trashcan. Begging is not allowed. I'm sorry for your Uncle's situation.
1046  Bitcoin / Development & Technical Discussion / Re: Compromise between fees and storage/bandwith cost on: October 29, 2021, 02:24:49 PM
Having coin tied up in LN channels removes flexibility when compared to using on-chain transactions to whoever you are trading with. This is because you are restricted to spending amounts the network can support based on available routes. This will always be the case, but the issue is pronounced today because LN is still in its infancy.

You can still pay someone on-chain with the coins you locked up. Right now, you can use third-party services like Boltz, ZigZag and Lightning Conductor. However, this solution is prone to routing failures, which are less frequent now thanks to multi-path payments (MPPs).
Using a third-party service to make an on-chain payment/transaction requires some amount of trust, and these services will typically charge some amount of fee.

MPPs should reduce routing failures, which should lead to more people using LN, which should lead to higher overall capacity.
1047  Other / Meta / Re: Reporter Statistics on: October 28, 2021, 09:25:06 AM
As long as you are not intentionally reporting posts that you know are not against the rules, it is okay if you have some bad reports. If your accuracy is in the low 20's (or lower), you are still helping the mods address posts that are against the rules.

As you become a more experienced forum member, you will naturally get better at reporting posts.
1048  Bitcoin / Development & Technical Discussion / Re: Step by step guide to go from public key to a Bech32 encoded address on: October 28, 2021, 08:43:57 AM
i dont understand why they needed to have bech32m if they already have bech32. the more address types that get created i think the worse that is for bitcoin not better. i dont know if anyone else feel that way or not especially though if the address type that is being changed had some type of issue with it that motivated the creation of a related address typing. but i guess they'll keep going. watch out for bech32P anytime soon.
You don't have to worry about anything, in the end you are just copying a string that if nobody had mentioned you wouldn't even know it is a modified encoding scheme! Your wallet does everything behind the scene for you. If it were necessary we would introduce bech32 a to z.
The more address types there are, the greater the chance someone messes something up when trying to create some 3rd party application, or otherwise. If you are a user of this 3rd party application, this will negatively affect you, and if you are a bitcoin user, this has the potential to reflect negatively on bitcoin.

Also, if you are trying to recover your wallet from their seed, having multiple address types adds complexity to the process, and may make some people erroneously believe there is a problem with their seed when they use their seed backup to generate the wrong address type.
1049  Bitcoin / Development & Technical Discussion / Re: Compromise between fees and storage/bandwith cost on: October 28, 2021, 07:20:32 AM
I wanted to point, that there's lightning adoption which means that higher transaction fees temporarily don't necessarily reduce its utility. At least not to everybody.

How are people growing LN adoption anyway? It does not seem to be the subject of late in the wider crypto community (DeFi, NTFs, and other trending stuff).

Exchanges (the preferred "wallet" by the majority of users) aren't promoting this tech either.
Having coin tied up in LN channels removes flexibility when compared to using on-chain transactions to whoever you are trading with. This is because you are restricted to spending amounts the network can support based on available routes. This will always be the case, but the issue is pronounced today because LN is still in its infancy. There is also the issue that most LN wallets are not as established as other popular wallets, and require the end-user to run a full node in order to use them (electrum does have LN support, but open channels cannot be in the middle of a route for other payments).

As a result of the above flexibility issue, most people will not use LN unless the cost to transact on-chain is high in absolute terms. There will be some people who will use LN in order to test out new technology, and who hope to profit from routing transactions, but most casual users will not use LN when on-chain transactions are nearly free.

I think once transaction fees are high for a sustained period of time, LN usage will increase.
1050  Bitcoin / Wallet software / Re: Poolin Wallet - A one-stop platform for your crypto assets. on: October 27, 2021, 02:34:00 PM
On the iTunes store, the developer for the poolin wallet is "POOLIN TECHNOLOGY PTE LTD" while the poolin.com mining pool's developer is named something in Chinese.

With the above being said, the poolin wallet and the poolin mining pool's websites both have links to the others' website. There is clearly some type of relationship between the two entities.
1051  Other / Meta / Re: Project Ideas: Visualizing Shilling (oh and hi again) on: October 27, 2021, 01:34:44 PM
My experience with reading altcoin threads is that it is unusual for "everyone" to be in agreement. I think it is likely to be more common for a group of accounts to defend a project, or for there to be a group of accounts that is positive about a project in order to drown out negativity.

As I said, I don't think that sentiment alone is going to be enough to detect shilling. I suggested some features for a model that might be able to be the input of a model that might be able to predict if shilling is occurring in a thread.

You also do not necessarily need to create exotic visualizations. For example, you can remove one dimension from your chart in the OP, as a binary classification model should use an activation function that forces the sum of the prediction outputs to equal 1.0. If you are predicting if shilling is occurring, you can probably just give a raw prediction. Or you could create a time series chart that shows when the probability of shilling was occurring over time.
1052  Other / Meta / Re: [Updated].UserLog request,same as ModLog but for user activity+more ideas. on: October 27, 2021, 02:13:05 AM
I think how I'd prefer to handle it is to prevent deleting posts within 24 hours of posting them, in the problematic sections only. Which sections are problematic?

Goods + child boards, and Services.

OK, the 24-hour limit is now in place in the sections that people mentioned.

I have detected a thread in the Invites and Accounts sub that is removing multiple bumps per day. Today he bumped his thread 4x, and appears to be testing the limits as to how frequently he can bump his thread going from bumping 3x per day on the 20th, and bumping at least that frequently every day since.

Would it be possible to have the invites sub restricted to prevent users from deleting posts similarly to the other problematic sections?

eta: I sent a PM to the offending user bringing the rule to his attention.

edit2: found another thread that has been consistently bumping his thread 3-4x per day for months.

edit3:
@hilariousandco: if you're willing to go after them, I'll gladly improve my script to count how many times a certain account deletes a post. I was even thinking of automating it to search unread posts: in 6 seconds, 12 threads got bumped. Many of those must be bump bots, so my plan is to make a script that takes the last x threads, then checks the last page of each, and reports bump bots when found.
There are other ways to detect bump spam with more precision, even if they is more time between bumps Wink
1053  Other / Meta / Re: Project Ideas: Visualizing Shilling (oh and hi again) on: October 26, 2021, 08:47:08 PM
When taproot was "locked-in", I would expect to see sentiment regarding bitcoin to increase. Ditto for when the bitcoin-futures ETF was approved. Does this mean there were bitcoin shills posting during these times? No, I would be very surprised if there was any actual evidence to support this.

I am not sure what your actual goal is, so some of my advice may or may not be helpful to your project. You could compare sentiment over time to the price of a particular altcoin. For example, the sentiment on a particular day could be compared to the current price, the price some number of days in the future, the price some number of days in the past, or by some measure of volatility in the past, present or future.

Some people have a genuine interest in a coin/token, even if there are shills promoting the coin (this is the point of shilling a coin). So it is possible that someone speaking positively about a coin when the coin is being shilled. However, if there are a group of accounts that consistently are positive about a coin when there is apparent shilling, there is a good chance that the group of accounts are professional shills.

If you can create a model that you are confident can accurately predict if a post is positive or negative about a coin/token, you can use the output of that model (in aggregation) as an input for a second model that can predict if shilling is occurring on a particular date. Other inputs for the second model could be data points such as the percentage change over the previous x amount of time as of the date in question ("x" could be substituted with "x, y, and z"), the percentage change in price over the previous x amount of time as of y amount of time in the past, and/or in the future, the number of posts made in a thread on the date in question compared to the number of posts made the previous week, expressed as a percentage. You can be creative and will have to experiment some.

Your second model will have to utilize some unsupervised learning method, as I don't think you can reliably label a thread being shilled at a sufficient scale.
1054  Other / Meta / Re: Reports Bad&Unhandled on: October 26, 2021, 08:18:44 PM
The forum does not remove "inaccurate" information and does not fact-check posts. If you want to post where posts are fact-checked, you can go to Twitter, and you will find a place in which nearly everyone thinks the same.

Do you know that from experience or do you just assume it should be like that? Inaccurate information that stimulates a completely illogical and unnecessary discussion is definitely something I report, but always with evidence that confirms it.
I can guarantee you that the forum will not delete a post just because it contains inaccurate information. The reasons for this are similar to why the forum does not moderate scams. There are many cases in which the moderators do not know with 100% certainty if something is true, including in the case of the thread referenced in the OP. There is also the potential or moderator bias.

There are a lot of people who have replied to the thread you reported. This is prima facie evidence that it is not sufficiently "low-value" for it to be removed, especially considering the amount of merit received of those who have posted in the thread.

My value scale is set much higher than yours, and I don't think the number of merits is the only thing that defines someone as a quality member - it's much more important to recognize what a low-value topic or post is. Very few forum members have understood what is written in this sticky thread.
You misunderstood what I was saying. I was saying that many people who have previously received a lot of merit are actively participating in the subject thread. A low-value topic in one in which it is not possible to make meaningful replies to the thread. If someone has received a lot of merit, it is generally unlikely for them to be making a lot of low-value posts.
Do you still think "that it is not sufficiently "low-value" for it to be removed"?


The user prohibited2021 was nuked earlier today, and as such all his posts were removed. When a post is removed, generally all reports against that post will be marked as "good", even if the reason is incorrect. I am not sure why he was nuked, however, he made several posts today that were basically one-liners.

My opinion on the subject thread remains unchanged.
1055  Economy / Reputation / Re: Shamm copy-pasted his own post in order to earn merit on: October 26, 2021, 12:21:56 PM
But since Shamm created a topic with a full-fledged guide, it makes sense to share a link to this guide as an answer, and not create the illusion of a lot of help in the form of a detailed answer.
Do you really think the number of times shamm posts the text of his guide affects the amount of help he is giving people? They are receiving the same amount of help regardless of if he posts a link to his thread, or if he writes the text of his thread.

I could not find out whats the wrong of this types of post? The content of the post is created by not another person or it has not been copied from another site. All the content is created by the shamm. If the same type of question asked by multiple people then the answer of the question should be same. In this case it is not unethical. Though it could be better if shamm could post the link or quoted the previous post instead of copying the full post which we usually do. And I do not think what is the purpose of the post either that is for merit or something else. We should be aware if anyone post something which might be harmful for the community.
Some people do not like the fact that he is posting the same thing multiple times and receiving merit for the posts.
1056  Alternate cryptocurrencies / Marketplace (Altcoins) / Re: 20K FTM for USDT/BTC on: October 26, 2021, 02:05:57 AM
Not saying this is not a scam attempt (maybe it is, maybe it isn't) but I don't think he means to sell at 1.01$ but at 1.01.

Like with 1% profit for the buyer.
I think it is actually a 1% profit for the seller (aka the OP). He is selling $1 worth of coin for $1.01.

I agree that it cannot be known if the OP is intending to scam, however there is not information to suggest that he is.
1057  Economy / Services / Re: (NSFW) Selling Nudes for BTC on: October 26, 2021, 01:30:41 AM
I am a very well known member of the forum. If you can send me some samples I can check the quality and legitness of your work. Feel free to PM me.  Cool

No problem with that. Will do.
@mindrust, if you have received a “sample” of the OPs “work” you should provide some kind of vouch or public review, as was clearly the reason why the OP sent you a free sample. You can give an honest review. The OP didn’t send you dirty pictures because she likes you, she was hoping to grow her business.
1058  Other / Archival / Re: Chainalysis Releases New Global Crypto Adoption Report on: October 26, 2021, 01:21:04 AM
I found it interesting to see how much P2P trading is done in developing countries. This may be influenced by remittances from wealthy countries to poor countries. It shows that bitcoin has a seat in the global economy.

The index only accounts for on-chain transactions. With LN and other L2 solutions, this is going to be less meaningful over time. I would expect countries with developing economies to have an outsized adoption of LN due to tx fees relative to average income.   
1059  Economy / Reputation / Re: Shamm copy-pasted his own post in order to earn merit on: October 25, 2021, 08:52:12 PM
Just to clarify something: There is no such thing as "self-plagiarism" just like there's no such thing as "self-escrowing".  If you copy/paste or repost something that you, yourself, have written it is by definition not plagiarism.  So please, let's stop repeating this meaningless phrase.

Although I'd love to agree with you, my university sees it otherwise, and if I ever want to get my MD, I do have to dance to their tune.
The forum does not come close to having the same requirements to cite sources as is required when writing an academic paper.

Quote
However, even if we call it a different thing, the definition would fit just right in this context: "Quoting you own work over and over again in order to get more citations" (or in this case, merits).
He writes content that people clearly find useful. I don't think the amount of merit he receives would be affected by him quoting or citing himself. I think he is probably trying to be helpful to new users.

I might compare your argument to someone saying that I write interesting, and helpful posts in order to get merit, and that the fact my posts are interesting and helpful is somehow a bad thing.
1060  Other / Meta / Re: Moderator merging non-consecutive posts on: October 25, 2021, 05:35:42 PM
Removing consecutive posts is about readability. When a single account has multiple posts written in a row in a thread, it makes the thread more difficult for others to read.

If someone deletes their posts that you were previously replying to, it would be appropriate for moderators to merge posts accordingly.

I don't think this is something that is going to lead to any kind of punishment or negative consequences for you.

the Mod may not know there used to be a post in between,
I think it should have been obvious, considering the timestamps of the quotes.
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