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481  Bitcoin / Development & Technical Discussion / Re: Why didn't satoshi use PoW for something else? on: October 23, 2018, 09:32:31 AM
Because it's kinda like trying to utilize the heat of your CPU to brew some coffee - you are adding new complexity and risks to the system that are simply not worth the benefit. SHA256 mining is secure and easy to reason about, other systems, especially those like boinc and folding are not. Devs are working very hard to keep Bitcoin free from bugs and attacks, and introducing some novel consensus algorithm would be against that.

I can't argue against that, less complexity which leads to less bug/attack vector is more valuable than generate research data, but risk the network.

Is donating CPU cycles in BOINC more secure than Bitcoins's POW? I believe "making mining it more useful" would be the very last thing Satoshi had in mind.

No and i already mention it. But my point is, there must be way to achieve it without much security trade-off.

Quote
While complex things such as biology/chemistry fields is difficult to achieve due to required research data and slow verification, AFAIK other fields including mathematics and physics such as PI, prime numbers, pythagorean triple, etc. is possible and verification time should be far faster.
It's useful for many fields including cryptography which Bitcoin uses.

There was Primecoin.

Gonna check that later
482  Bitcoin / Bitcoin Technical Support / Re: Just lauched bitcoin core as usual and database errorr on: October 23, 2018, 09:20:07 AM
long story short it's now reindexing blocks on disk... which doesn't mean downloading the whole chain right?

No, only reindex all blocks and download new blocks since last time you connect to Bitcoin network.

I can see wallet balace to 0 but there's a list of recent transactions which are right, so it's just a matter of waiting, yeah?Huh in case I have an old wallet backed up!

Yes, all you need to do is wait. However, you should backup your wallet.dat, especially if it's also placed on external HDD.
483  Bitcoin / Development & Technical Discussion / Re: Why didn't satoshi use PoW for something else? on: October 22, 2018, 04:49:24 PM
Is it only me or everyone miss OP's point? OP clearly knows that electricity used for PoW isn't wasted and used to secure Bitcoin network (such as block, transaction, OP_RETURN data, etc.), but to make PoW even more useful.

While complex things such as biology/chemistry fields is difficult to achieve due to required research data and slow verification, AFAIK other fields including mathematics and physics such as PI, prime numbers, pythagorean triple, etc. is possible and verification time should be far faster.
It's useful for many fields including cryptography which Bitcoin uses.
484  Economy / Gambling discussion / Re: Perfect crypto betting experience on: October 22, 2018, 04:25:13 PM
Since we're talking about crypto betting, my criteria would be :
1. Facilitate anonymous users, such as allow TOR/VPN connection and have .onion website
2. No KYC or any unnecessary personal information
3. Provably fair which is verifiable
4. Trusted/have good reputation
5. Fast/instant withdraw
6. Be open about casino's operation (such as bankroll, server condition, etc.)
485  Economy / Gambling / Re: lightning-roulette.com on: October 22, 2018, 04:00:05 PM
Lightning network casino? Now it's interesting. This might be obvious, but do you automatically send the winning amount to our LN channel if we win since there's withdraw page which is weird for LN-based casino?
Any chance you'll include LN transaction hash in your provably fair?

Solid green background do burn out my eyes.It would be much preferred on using up some cool  colors- just a suggestion and this is indeed a onchain game but would really be hassle to make each bet yet you would really need to deposit everytime and also clicking that "OPEN IN WALLET" doesnt works. We dont know on which wallet do integrates on this one.You only have the option to copy that invoice.
For casual gamblers im sure most of the time they wont even know on what to do.

Actually it's not on-chain game since the transaction occurs off-chain/on LN, only you and the casino who knows about the LN transaction.
486  Bitcoin / Development & Technical Discussion / Re: Entropy, how to calculate it from series of outcome on: October 21, 2018, 05:24:11 PM
No need to waste your time. The human brain is less than '1/10 random' as an PRNG.

Do you have a source for this ? I would like to read more about it  Cool

How about this thesis http://www.jbonneau.com/doc/jcb82-thesis.pdf with title "Guessing human-chosen secrets" by Joseph Bonneau.
I haven't read the thesis thoroughly, but there are few interesting things such as human choice of PIN in page 60.
487  Other / Meta / Re: Irfan_pak10's Merit source application on: October 21, 2018, 03:48:35 PM
As S_Therapist mentioned, don't forget to quote 10 undermerited posts/threads. I'm interested what kind of post/thread you will show.

The merit system largely favored older members. Merit sources also tend to be older members, which might correlate to some favoritism towards older, more experienced users. In my view, somebody would have to look out for newcomers following the right steps towards becoming better contributors in this forum. And that's because even though so many new comers are continuously rushing in the forum, the merit system puts the majority of them in a deadlock. But they can't all be bad apples!

I disagree, maybe you see that way because older member usually have more knowledge and thus can create better post/thread.
488  Bitcoin / Development & Technical Discussion / Re: Proof of waiting better than proof of stake and proof of work on: October 21, 2018, 02:50:34 PM
Well, according to the IOTA protocol, the attacker doesn't make the choice of which transaction it should verify. The other users do the selection. The other users select the attacker, not the attacker to other users. So, if the attacker changes the source code, it wouldn't matter because the attacker doesn't make the decision. The other users would randomly select the attacker and check the transaction

so, does this solve the problem?

No, because as i mentioned previously, attacker can change IOTA client source code to verify transaction he want to. IOTA protocol (i assume you're talking about documentation) only mention how it works normally.

There are many articles/news about IOTA's double attack problem including their official blog at https://blog.iota.org/attack-analysis-the-simple-parasite-chain-42a34bfeaf23 and about non-default transaction selection attack at https://cryptonomist.ch/en/2018/07/12/tangle-technology-2/.

Quote
But beginning with a small idea (which theoretically doesn't actually work) just to later add 'fixes' to it isn't that great..

can u please tell me why wouldnt it work.

Because you clearly either don't have the basic or haven't done enough research for your consensus method. It's shown since your idea still have critical vulnerability.

I don't believe in asking people to show-up with a full-fledged idea/proposal to be the best we could do. As I understand, op got some idea and tries to share it with us, it is great and I appreciate it.

That being said, I have to thank you @Etfbitcoin and @Heretik,  @bob123, ... for contributing to this discussion, you guys did great job too. Unfortunately I'm personally overloaded with other projects and couldn't participate, but I'm following this thread and have found nothing harmful here.



I never ask something that hard, do i sound like that?
489  Other / Meta / Re: Fire Hydrants on: October 21, 2018, 03:55:12 AM
You can now bypass the login CAPTCHA by bookmarking the link generated for you here: https://bitcointalk.org/captcha_code.php

If it causes problems, I might restrict it to Jr Members and above or something, but currently anyone can do it.

And https://blog.cloudflare.com/cloudflare-onion-service/

Compared before they announce their service, now i can access far more website without seeing annoying reCAPTCHA (with JS enabled though). Even if i see reCAPTCHA, change circuit once usually solve the problem.
490  Other / Meta / Re: Another on topic post deleted !?! on: October 20, 2018, 07:20:42 PM
You basically advertising an altcoin (which is also advertised in you signature btw) in a discussion, without any explanation about it and why it is relevant.

It's not advertising and have correlation with topic, even though i doubt people would understand what he's trying to tell without check the links. Read both thread's topic and link/source carefully next time.

I'm someone who frequently edits my own topics and posts with additional information ...

Only you and very few member know about your custom. I'd bet it's deleted because reporter and moderator don't know about your custom.

I'd suggest add message such as "p.s. will add additional information later" on bottom of your post. Sometimes i do that when i want to give lots of information and my post never deleted.

This is just more blatant and unnecessary censorship by bitcointalk mods.

No, even few members who against LN (but have knowledge & bring argument with facts) is welcome here.
Edit : it's example to show that there's no unnecessary censorship by bitcointalk mods

It's not advertising and have correlation with topic, even though i doubt people would understand what he's trying to tell without check the links. Read both thread's topic and link/source carefully next time.
I do not click on links that I don't know what they are
I don't click on links to know what they are.
I don't click on links to know of they are topic related.

This is basic security tips.

This guy is basically promoting some website to get clicks.. in a lazy way, without any explanation about the link.

The link may be useful , but he didn't explained and got deleted. Fair enough in my opinion.

With proper add-ons/browser configuration (such as disable JS by default), clicking unknown link isn't that dangerous.

While i agree with your opinion, my point is it's not advertising.
491  Economy / Gambling discussion / Re: [Video] How do Casinos make money? on: October 20, 2018, 06:32:06 PM
I don't know how much it's relevant to the online gambling scenarios but definitely worth checking it out.

It's highly relevant since some tricks could be applied to online casinos such as :
1. Live online dealer (using video streaming)
2. Lots of free things such as deposit bonus, gambling coupon & faucet
3. Using psychology design to make their website theme, such as using soft color

Also, online casino can be accessed anywhere with internet connection which tempt gambler easier while gamblers still need drive to physical casino.
492  Other / Meta / Re: So I've Become a Merit Source... Need Some Advice on: October 20, 2018, 06:18:31 PM
Based on my experience (not as merit source though), i just waste my time looking for good/constructive post made by lower ranked member. So, now i give merit purely based on post's quality and ignoring their rank, whether it's newbie or other rank who already hundred thousand merit.

Also, is OP really a merit source? His sent merit history is too short & even me have larger sent merit history.
493  Bitcoin / Development & Technical Discussion / Re: Proof of waiting better than proof of stake and proof of work on: October 20, 2018, 03:04:18 PM
Quote
Attacker could make 2 transaction and broadcast each transaction to different nodes. In theory, half of all nodes would get different transaction from same address before get the other transaction.
This would make each nodes have different list due to propagation delay and thus leads to split-chain.
Well, we can borrow some of the architecture IOTA uses. A user with an unverified transaction has to conform and broadcast other user's transaction.
For example: If I send some money to someone else, then i would have to check the transaction of another user whose transaction isn't checked and verified. Someone else has to do the same thing to my transaction. The selection of which user has to verify my transaction would be done in random. Now I believe that you know how IOTA works so that i wouldn't have to explain the entire concept.

Does this solve the problem?

I only know architecture of IOTA in general, but i think attacker could make few non-conflicting transaction which contain check/verification result of 2 different conflicting transaction made by attacker. I'm assuming the attacker modify random user/transaction selection (from wallet source-code) & i hear IOTA Tangle looks diversed/splited when visualized because those attacker.

So, that doesn't solve the problem IMO.
494  Bitcoin / Development & Technical Discussion / Re: Proof of waiting better than proof of stake and proof of work on: October 20, 2018, 02:19:26 PM
Quote
Who is stopping the user to make this transaction ? What mechanism ensures that nobody can create a 2nd transaction EVER ?
How can anyone know whether i have already created a transaction if i didn't broadcast it yet ?
Well, If the user tries to do a second transaction, he would have to use his public address again. The network would just scan the entire list. If it finds a repetition in the use of the address, then it would know that the address was used the second time.

You should learn a bit about network propagation, gossip protocol and game-theory in general.

Attacker could make 2 transaction and broadcast each transaction to different nodes. In theory, half of all nodes would get different transaction from same address before get the other transaction.
This would make each nodes have different list due to propagation delay and thus leads to split-chain.



Very simple visualization made by me with draw.io

Legend :
Ellipse = Node
Light Gray = attacker
Blue = node which receive transaction A first
Green = node which receive transaction B first
Red = node which receive transaction A and B at almost/same time.

In my visualization, verification and propagation time to each nodes are exactly same, so few nodes will receive both transaction A and B at same time. So, how do you solve this problem / what will red nodes do?
495  Other / Meta / Re: KYC for New Forum Registrants on: October 20, 2018, 03:42:42 AM
Anyone who suggest KYC in cryptocurrency space shouldn't use cryptocurrency in first place and keep using fiat (exception for centralized exchange and few merchant). I would rather leave this forum rather than give my identity.
Even CloudFlare implementation is enough to make good member who want preseve their anonymity left this forum.

If we want to prevent spam, scam or merit farming, disable signature and remove bounty child board are better option.

TLDR : Your idea can go to hell.
496  Economy / Gambling discussion / Re: Lost $350k / 54 BTC gambling, need help :( on: October 19, 2018, 06:38:34 PM
The fact you ask help after huge losses means you actually don't want to kill yourself and face your problem.

The fastest way to solve your emotional problem is by keeping yourself busy, either with hobby, job or build deeper relationship with those you know. Even though asking for professional or family help would be better. You might want to use application such as https://freedom.to/ which block/hide application and websites and it's not limited to help gamblers, but many other addition as well.
497  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency on: October 19, 2018, 05:51:33 PM
After i upgrade to most recent version, i keep receive message "WARN    global  src/p2p/net_node.inl:1338       No incoming connections - check firewalls/routers allow port 18080". Should i leave it alone or configure my firewall or/and router?

WTF is going on with da fork?
Our exchange using only CLI.
Now all we see SYNCHRONIZATION STARTED.
Everything is updated. But synchronization going forever.

Should we restart  our exchange https://exbase.net

or just wait?


It took some time since it actually upgrade database version, not sync process. In my case, restart both CLI and monerod fix the problem.
498  Economy / Service Discussion / Re: Anyone already tried Guarda Chrome extension? on: October 19, 2018, 05:41:59 PM
If it looks awesome to you, you might as well explain why. They have the code up here on their github repo : https://github.com/guardaco/guarda-chrome-extension but that doesn't really seem like a source code to me. It's just a ReadMe.md file with some code instructions. I'm not very proficient with extensions but someone who knows about them should review the code. Well, if there was any..

Because it's not, you can't make any aplication only with markdown standard. The listed code can't be reviewed since it's small parts of their source code.
Even their other repository that not-forked such as https://github.com/guardaco/guarda-android-wallets is a messed up. It contains both source code and compiled application (both .java and .apk/.jar).

Just use MetaMask if you really want wallet on your browser.
499  Bitcoin / Development & Technical Discussion / Re: [Discussion] Dandelion - A protocol to hide transaction origin on: October 19, 2018, 10:27:28 AM
The research on the paper happens somewhere in 2014, where BIP 151 about E2EE (end to end encryption) protocol hasn't used by Bitcoin Core or other client

BIP 151/end-to-end encryption aren't used in Bitcoin yet, and they also don't provide anonymity to Bitcoin nodes anyway, so there would make no difference in Bitcoin's anonymity even if they were in use.

Thanks for the information, i just recheck and it's true. It's used bcoin client and looks like i didn't remember it correctly.

But, can you explain why BIP 151 don't provide anonymity to nodes? Excluding de-anonymization method which require full nodes, AFAIK ISP/government/spy at most only can know that it's Bitcoin full nodes traffic without knowing which transaction/block is being transferred.
500  Bitcoin / Development & Technical Discussion / Re: BitMEX Research new client (Bitcoin BitMEX Research client) on: October 19, 2018, 04:51:58 AM
Another Bitcoin Client? That's great.

But frankly unlike BTCD which rewrite from stratch & Bitcore and Knots which have more features, i don't see any strong reason to use this client.

Therefore, if the Bitcoin Core repository gets hijacked or deleted, the codebase can still improve using the Bitcoin BitMEX Research client or any other set of clients.

There are plenty forks on GitHub which serve as backup or mirror and verification is possible with achow101's post you quoted.
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